Make a water wheel - perhaps it would work with marbles in a marble run too
How To Stencil With Bleach
ever wonder how to make a hexaflexagon?<3
Toys from Trash
how to make a diy conveyor belt with kids!
STEM Challenge for Kids: Create a pinball like marble maze game using paper plates and other basic craft materials. Fun design and building challenge! ~ BuggyandBuddy.com
Knikkerbaan van lege toilet rolletjes! | idee voor bij het thema Spelen is Leren| www.peuteractiviteitenweb.com
Physics :: Force and mechanical :: Gear Windmill - DIY Toys World