Number Ninjas and the Purple Volcano!

Tree Bear stars in this short video called "Number Ninjas and the Purple Volcano" Yes, there's a lot of counting because those pesky ninjas are back, but we're making the world's first purple volcano!
Are you looking for a recipe to make your own home-made volcano? Here's a great one! We followed one from Osmo with a few adjustments:
www.playosmo.c...
100 ml of warm water
10 ml of dish soap
400 ml of white vinegar
Empty 2-litre soda bottle
2 drops of red food coloring
Baking soda slurry ( ½ cup baking soda and ½ cup water)
Step 1: Mix the dish soap, water, white vinegar, and PURPLE food coloring and pour it into the empty soda bottle.
Step 2: Make a baking soda slurry with ½ cup baking soda and ½ cup water. Mix it thoroughly, until it’s completely dissolved.
Step 3: Quickly but carefully pour this slurry into the bottle. Now, watch the volcano erupt and spill out PURPLE bubbly lava!
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/ imaginationroom