How To Make a Stair Climbing Dolly || Stair Climbing Trolley || Science Projects

[@BlissEmmanuel]

🎉

[@billbrown994]

Very nice building but no music would be best imho🙃

[@MeenaMeena-dw7jk]

Excellent working

[@paulaandrearincon8137]

niño pero la medidas de la escaleras???

[@willielabuschagne1208]

Is this a joke?? What use does that little thing have?

[@BlissEmmanuel]

🎉

[@MeenaMeena-dw7jk]

Excellent working

[@diyscienceprojects]

Thanks