The Most Difficult LEGO Sets...

These are the most challenging and difficult LEGO sets to build!
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LEGO sets continue to get larger and more structurally complex, so naturally, LEGO sets have been getting more difficult even for the most experienced LEGO builders. In this video, we’ll explore the LEGO sets that fans think are the most challenging, complex, and difficult to build. Despite the reputation of LEGO Technic for having the most difficult sets, a lot of these are not LEGO Technic, so be sure to watch the entire video to see them all. Have you built any of these sets before?
What is the most difficult LEGO set that you’ve ever built? Let me know in the comments below!
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[@ChristianAlder-zj6tt]

The starry night set was an absolute PAIN. i had to take apart bag 9 THREE TIMES because I either missed a layer or added a different colour.

[@21backwards78]

It wasn't that hard for me

[@MondayThirteen]

Yeah I had issues with differentiating the shades of blue and had to redo steps as well. It didn't help I was using dim dinning room lighting during the nighttime either. Thought I was losing my vision but now that I'm hearing other people had a similar experience, I don't feel as bad!

[@keelsshorts2734]

Wasn’t difficult for me

[@ccxu1154]

Once I almost caused a whole three layers to break after trying to replace one of the bricks.

[@StuHol-jb1hh]

@keelsshorts2734 who cares?

[@nilsnorman1889]

Im building the eiffel tower next week. Wish me luck :D

[@deactivatechloeandaudrina56u89]

🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀🍀

[@Unknow_user-j4d]

Good luck :)

[@Rasse_738]

Good luck

[@XaosInDarkness]

I have started, and am about half way through. I was so surprised as to how small the intruction booklets were! Then I noticed, most steps are "x2", "x4" all the way up to "x48", which was mad 😅 Definitely a build I'm taking slowly. It's beautiful though, 100% worth it

[@ethanol1586]

I took about 3 days, honestly not too bad! Put on some music, movie, or podcast and time will fly! The result is definitely worth it!

[@poykehmusic]

<a href="#" class="seekto" data-time="345">5:45</a> *"It's not rocket science".* Well, you choose your words _wisely._

[@OptimusSubPr1me]

<a href="#" class="seekto" data-time="330">5:30</a> the cargo bay stickers actually tripped me up enough where I ruined the sticker and I had to remake a whole new sticker from the leftover sheet using an exacto blade. You can't tell now so I think I did pretty well fixing my issue.

[@Craxin01]

I wouldn't say it was difficult, but it was a bit tedious. Building the cherry blossom bonsai had quite a bit of repetitive steps, since basically all the leaf assemblies were identical.

[@NexeL_NKC]

My most difficult build so far has been the Dune Royal Atreides Ornithopter. The mechanisms that got the wings to fold in and out and flap at the same time is some of the craziest lego engineering I've ever seen. It was an absolute pleasure to build it. I only took the thing apart because I was running out of room to place my speed champions cars and the midi-scale starship builds lol.

[@Malthebasse]

At <a href="#" class="seekto" data-time="53">0:53</a> what are those two astronauts doing in the background?

[@massimoraicu1032]

Eyoooo 🤨

[@Defbirdy]

Playing leap frog of course!

[@TheGilGS]

Some Technic sets are difficult because of some pieces, like gears and others, one slight mistake and all gets jammed ! The big Star Wars sets kinda fall in that category too. But you know and everbody does too, it is amazingly satisfying to assemble them and watch them "grow piece by piece"

[@Chris-vw2tl]

Typewriter was not that bad. The large lego car gear boxes were a nightmare.

[@slicelifetv]

First most difficult set I’ve ever built was the Technic Bugatti.

[@isaachunsberger2484]

for the repetition category, the Colosseum deserves a nod. I'm not sure all the sections were identical, but many of them were very similar and you make them over and over again.

[@the-child-who-survived]

Got it for Christmas

[@WaterpocketFold]

Not repetitive enough! I’d get used to building sections in a certain way and get into a relaxing rhythm. Then the build and/or the instructions would change a bit.

[@UtarEmpire]

I'm almost certain that I screwed up the Dune Ornithopter but I never had the heart or the motivation to go back through it all over again!

[@samuelmelendez7566]

I salute to those people who completed these sets 🫡

[@kathyk6652]

This looks great on Lego 😅

[@davidriley2414]

Yeah, this looks great on Lego😅

[@BrandonScott-mi5pz]

EXCELLENT SPITBRIX WORK.

[@FatCatGarfield]

I thoroughly enjoyed building the space shuttle set. The stickers aren’t as bad as it may seem. You kinda develop a system for placing them correctly and relatively quickly after the first few.

[@garyolsen6018]

I can tell you every time I have built one of the <a href="#" class="seekto" data-time="68">1:8</a> scale technic super cars I have finished the steps for transmission only to find an extra gear after those bags are done. Huge pain to go back and find where it belongs. Often have to disassemble a large portion. Every. Single. Time!

[@altoclef4249]

Happened to me with the technic lamborghini huracan, the gear that connects the wheels to the engine was missing and I realized it when the whole thing was complete. I just have it as is, without the gear. Never even tried to fix it.

[@hoomanplaysgames]

i messed up something in the suspension of Dom’s Dodge Charger and have never had the motivation to figure out what i did wrong 😅

[@zhenqin6719]

now I want to get the typewriter set!

[@Phoenixcaptain46]

Something about the anniversary R2D2 just kept causing me to mess up and I would have to go back to fix. Then the end result is so delicate to move that I put it on the bottom shelf of my display case just because I was worried about it coming apart when picked up.

[@adamosborne3765]

One thing I found really hard was in red dragon's tail the rockwork above the inn. They where adding so many parts in one step at with so many angles and it had me pretty annoyed by the end. Overall the build was fun though.

[@seahawk124]

I built the globe (21332) last Christmas. I love it and sits proudly on my desk, but damn, the repetition of the stuctutre with the technic piececs was an ordeal! Still love it, though.

[@Defbirdy]

<a href="#" class="seekto" data-time="49">0:49</a> I love the cool detail of two space men playing leap frog on the top right!

[@rogerweikers]

I thought you'd bring the Colosseum to this video - I don't have it, but people say it's incredibly repetitive

[@JosephHelmig]

I built the Hulkbuster that has 4000 pieces and the amount of technic pieces was insane it also has 3 books and like 24 bags. Also it was very repetitive.

[@Ethanialstiel]

The gearbox on the airbus helicopter was a bit complex but fun

[@poykehmusic]

On the *Creator 10214 Tower Bridge,* 556 of the 4300 bricks are 1x1 cheese slopes that have to be placed on 48 plate assemblies. There's also 230 1x1 bricks, 160 1x1 bricks with studs on side, 230 1x1 plates, and many more little plates. There's almost no "full bricks" in the entire build. The two towers are identical. The build was exciting though. I unbuilt it once, and rebiult it the following year. Still a great experience. Also, _it didn't come with numbered bags._

[@matthewkuscienko4616]

I have to agree: the end result looks great, but with how many small pieces it has, it's a hard build to get through. Personally, unlike you, however, I have no desire to take it apart and rebuild again -- while I can usually finish a set in a day, even with close to as many pieces as the tower bridge has, the shear number of small parts had it taking me 3 days to complete. Having numbered bags would have helped for sure

[@JesseTroller]

Get a System fan to build a Technic set, particularly a large one. That'll sum it up.

[@m63fan]

I just did that last year with the Lego Bugatti Chiron. I mainly do system sets, and I wanted to try a complex Technic set. I even said, I have experience too, because I've already built the exact same car in Studio a few years ago. Well, the virtual build was a nightmare (especially the spoiler at the back), but the real life build itself was hard. I spent like about 24 hours in 3 separate parts, to assembly the car. But it's ready, and I think I'm never going to take apart. :D Hell, I even thought about it, how do I replace the rubber bands in the gear shift mechanism, if they snap years later...? :D

[@kekistanifreedomfighter4197]

From my memory the most complex set I remember was the 2008 Star Wars: The Clone Wars V-19 Torrent starfighter because it used gears and air shocks so that the two wings on the side and landing gear would fold up or down with the main wing in the middle that hinged up and down. I remember I did something wrong with the gears because the wings would only fold out about 3/4 the way before getting stuck. That was little me's first foray into the magic and problems of technic parts and gear ratios.

[@JosephHelmig]

<a href="#" class="seekto" data-time="321">5:21</a> if I got a set with 24 stickers I would cry.

[@coconut8192]

As someone who has built both the Eiffel tower and the Colluseum I can honestly say, while both sets are extremely repetitive, Eiffel tower was a much more fun and interesting build. Colluseum felt like a chore. Mentally painful!

[@keelsshorts2734]

Personally repetitive does not bother me

[@Sonderax]

The last set i brought prior to summer 2024 was the world map. Took me from mid 2022 till march 2024 to complete it cos it was the most boring and painful build. It's the reason i've brought just 4 sets since getting it cos it killed my love for LEGO

[@MattiaBulgarelli]

Monsieur Eiffel, as an engineer, would not be happy to hear his tower measured in inches, even if it's a model.

[@grahamgilmore42]

I just ordered the Gotham City Skyline. I’m so excited. But the only thing I’m not looking forward to is all the stickers.

[@Pumpkinheadedman]

I have a copy of the typewriter myself. I've taken it apart and put it together twice now, and I can't seem to get it to work properly. Like, it works, but not well. And each time I rebuilt it made something different not work. Still an amazing set however

[@WizardOfOss]

Just be glad they put all of those 144 studs on the Eiffel Tower in a single step.....imagine they would have done just 2 or 3 per step like they usually do..... As for those stickers on the Space Shuttle, I just didn't even bother. These stickers were bad enough in their own right, but what makes it even worse that they don't include even a single spare. I actually didn't use any of the stickers in the set, as the other ones were pretty terrible too, with that white background that doesn't match the plastic at all. It's a great set, but it's a shame that unlike with the Saturn V, they didn't go for all prints here.

[@Lamalas]

The most difficult set for me so far was the Lego Technic Solar System (set 42179)

[@The_editor_0.1]

2 of my favorite youtubers uploaded in the same day let's go

[@Cunningfoxoflego]

The land rover defender(technic) that i built makes a cracking sound when it drives, so it’s a display piece now. It was difficult to make.

[@lauriewhite8153]

I built the Chiron a few years ago, it was all going well until I united the two axles. The car doesn't actually roll forward in drive when you go to push it

[@jacksonwait2351]

one of the differentials is oriented the wrong way, most likely

[@42evad]

The typewriter build was BRUTAL and took my wife and I several sessions to complete, but DANG does the finished product look good, and the functionality of all the components is incredible! 10 out of 10, would build again! Great vid, hope to see you at 1M subs soon - and beyond!

[@imbatman9845]

for the tree house, you can just put any collor where they tell you to put one, it dosnt matter

[@bucketslash11]

the slope of the enginecover on the Ferrari F40 Speed Champion was so finnicky, a bunch of 1x1 tiles and flats just to achieve the gradual sloping

[@MakDemonik]

Lego World map: "This is absolutely one of the most repetitive and tedious sets there is. It's just placing pieces according to a color map" Any person whose hobby is embroidery: "Ah bliss! I'm home : ) "

[@VikingDante32]

You forgot every technic set ever

[@emilyhunter666]

For me, the one set I struggled with the most was the UCS Republic Gunship. That was my first time building a larger model and there were a few times when I wasn't even sure I'd be able to finish it. Took me a couple weeks, but I got there and now it sits pride of place atop the fridge. Soon I'll be attempting the Perseverance. But first the Tuxedo Cat and Da Vinci's Flying Machine.

[@Ability-King-KK]

Dear god. Makes me glad that I only stick with the _Animal Crossing_ and _Transformers_ sets. At one point in time I did want to get the Eiffel Tower set, as well as other landmark sets because I like world culture, but after watching this I'm glad I never did.

[@JedicollecterMason]

how dare youtube hide this for 22 minutes

[@DB-thats-me]

On 42009, the mobile crane, I transposed a free spinning gear for a fixed gear. I didn’t become aware of the error until the end of the build and i was a part short whilst I had the similar piece left over. Being as the mistake was buried deep in the drive train, I never fixed it. The outriggers have to moved manually but its a small price to pay.

[@eergdgd-uc9ns]

did something very similar had to use several pairs of pliers to preform open heart surgery but managed to fix it

[@mad-bloodypearls]

Love this channel

[@RCT335]

Surprised the Original Taj Mahal set isn’t on here. The thing was a terror to build and the dome on the top was a pain.

[@frybodelgado1482]

Mine was the famous Falcon. If only for its enormous size and how lokg the build was. Than of course keeping the parts in order and the overall structural problems… it was quite the challenge altough also very rewarding!

[@Wendy_O.]

Believe it or not, I find repetitive builds really chill and relaxing. I use a sorting tray and set up an assembly line, with a favorite playlist in the background. It is pure bliss.😁 Now, I have very poor eyesight, difficulty distinguishing certain colors, AND not the greatest manual dexterity. But Lego has been very therapeutic, as well as rewarding. The NES and typewriter were a couple of my favorite builds because I was actually able to get all their moving parts to work properly.🤣 The Pac-Man set was a blast as well, even though assembling and placing those 64 dots left me with very sore fingertips! 🤣 But seeing these sets displayed proudly on my shelves makes all the discomfort worth it.

[@Maximilian7992]

My first and last complex Lego set was the Lego Technic Pick-Up Tow truck 9395. I built it when I was like 12 or 13. It was the biggest lego set I ever built and I never wanted to do a complex build after that ordeal. It took me over a day to finish it and I did it all by myself.

[@hoomanplaysgames]

gotta say, while they aren’t as hard as many of the sets in this video, i thought the pac-man machine and globe sets were pretty repetitive, and the ‘Doms dodge charger’ car and the NES (mostly the tv) were pretty complex. i still haven’t figured out what i did wrong on that tv, but it definitely doesn’t work how it’s meant to.

[@Marco-fs9bs]

the hardest time i had while building a lego set was with Kylo ren's shuttle (the one from rise of skywalker) very cool build but i swear, i messed up so bad when building the mechanism inside of it that i had to take it apart and start from scratch lol

[@gucciog2231]

Most difficult sets are the ones that come with missing pieces! I have to ID the piece go online and try to find it and then try to find one in stock. made me put the set aside and forget about it

[@harritube632]

The medieval blacksmith tree took me like 3 hours to make because it kept on falling lol

[@legoguyftw9045]

I built the Eiffel Tower over a 5 night period and I can confirm that it was easily the most repetitive set ive ever made.. worst thing was, even 2 days after finishing it my finger tips were still hurting after constructing all of the Girder and Lattice sections! 😂

[@pelirrojonz]

<a href="#" class="seekto" data-time="470">7:50</a> being colorblind makes it easier!

[@zonoskar]

anything pre 1990 is difficult. I had a tough time assembling the 8880 super car.

[@rooomba36]

Destiny's bounty from 2012 of lego Ninjago these moving wings were awesome but always was one brick ahead and missed key steps that made the parts moving

[@Karalainee]

The NES tv made me rage quite multiple times. Works till you put the tv frame on and stops. Aghhhh

[@spudmaphot]

Most if these pale in comparison to the app controlled D 11 Bulldozer. I had trouble figuring out where pieces even lined up based on the instructions for the main mechanism and ended up making a critical mistake. Thank God LEGO are somewhat flexible or it would have been a nightmare to fix.

[@jeremybake2761]

Went down to subscribe and noticed your cannel name. Scrolled back to <a href="#" class="seekto" data-time="475">7:55</a> SpitBrix is calling someone out for licking their LEGO...

[@YOURteacher_100]

In getting Barad-Dûr for my birthday in June, I’m going to be there for a while

[@amiral_penguin]

lucky... that set has been tempting me every time I go to my local lego store... but it's one damn expensive set for a student on a tight budget...

[@YOURteacher_100]

@ it’s been sitting under my bed for a couple months now, glad it hasn’t gone on sale anywhere yet

[@ACE_0_SPADES]

<a href="#" class="seekto" data-time="103">1:43</a> the what?

[@GuseWorx-yoy]

The massive…,

[@ACE_0_SPADES]

@@GuseWorx-yoy you know what else is massive?

[@LON009]

Is there a difficulty indicator in these sets? Like with Gunpla, that has RG, HG, MG. If not, maybe Lego needs one.

[@angusmcnay5449]

The age range.

[@KiraB-b5f]

When I see your video I give like ❤ you are awesome :3

[@y_noT42]

Crazy that you ddint mention the death star 2

[@Sekir80]

Hi! I've searched your channel (later youtube) but didn't find evolution of building techniques. Could you do a video of simple->advanced->expert building techniques?

[@jacobrice9059]

I recently built the fortnite supply Llama set and it gets super repetitive halfway through since you have to make multiple of the same cheese-slope patterns for the llamas fur

[@MAllen-ec9by]

Great Video, I have had some of the sets here, and one that particularly stands out, was the shuttle, and those %*#$ing stickers, as take my word, they were a right pain! I almost gave up putting them on, it was that bad, though I did finish it in the end. As for the most difficult set, there are a few that made the list, but one that stands out was a pneumatic truck set, although I don't remember the number, it took ages to get the workings to move like they were supposed too as I found out later that the instructions weren't printed right. Eventually, It took me over 5 days to make that set, so yes it's that one.

[@hamadal-marei259]

The old Batman tumbler I got it when I was seven so it seemed impossible at the time

[@liamdrinkwater6577]

I would agree that technic sets are the most difficult and fiddley.

[@lucibone6968]

Every technique is difficult especially cars one

[@erciyes84]

Thed buggati bolide the rear part that was next to the engine had my brain melting because I PLACED THE REAR PART ONE FURTHER i felt like giving up but i did it

[@verios44]

I dont consider any of these bad to build sets. People just have weird expectations for Lego I own two of what was listed here. Eiffel Tower and Space Shuttle.

[@Brookesey]

I dont think you spent enough time on caps shield, it is the absolute worst set i have ever built, so repetitive, so delicate

[@gdvalle9993]

The bmw m1000rr... Took me almost a week.

[@koppanymarton9793]

So uh, skill issue?

[@chriscarpenter3370]

may I ask why you started with a puzzle?

[@peterbumper2769]

Tower bridge was not fun, and the bags were not numbered

[@JoshBiddle-s7q]

Hi I built the Lego stranger things set that was quite easy basically got one hand and to arms The hardest set I built was the Lego Dune set that was hard

[@bear-7020]

interesting video

[@JackRodriguez1]

<a href="#" class="seekto" data-time="663">11:03</a> bro It has to be 75318

[@lucibone6968]

The Mercedes-Benz g wagon orange 2024

[@ThatLEG0Guy]

xanyone else spot the error at <a href="#" class="seekto" data-time="647">10:47</a> dont know if thats ironic or a great example

[@Kaffeelefant]

The Lamborghini FKP 37 Set 42115 I’m 12 years old by the way

[@melissafisher9551]

I have a old Lego boat my dad gave to me and it have a illegal building technique

[@BrickBuiltFlier]

Yay!

[@gwened]

Please convert inches to cm and feet to metres, at least as subtitles, for the rest of world. After all, Lego is from Denmark and America has not bought the country (yet) :)

[@melissafisher9551]

But I don’t know how to show you a picturer

[@HammersDown]

Avengers tower

[@cursed_xzy-z4h]

rich people problems

[@Angelaaou]

Hello

[@ParrotGab]

Technically the puzzle is a lego set, because the parts are by lego

[@cincinxgamer1772]

113rd comment

[@NEOfite78]

Can I get a high please I love your content

[@Richered-i7g9l]

1 minute👇 <a href="#" class="seekto" data-time="202">3:22</a>

[@michaelgraves6664]

Why did you say that at 3:22?

[@Ronaldo_edits797]

1st🎉

[@Virgil_chair_18O]

first here. Pin for dedication?

[@Virgil_chair_18O]

in 30 seconds :D

[@pandurial]

Keep dreaming buddy

[@pandurial]

Minceraft YTber