portable roads that are easy for kids to put together and will travel easily, made out of old denim and yellow paint. velcro helps them stick to carpet - awesome idea! I'm so doing this with a pair of my old jeans!
Use cardboard, craft sticks, and hot glue to create an epic marble run! The marbles land in paper cups at the bottom of the track. This is a fantastic engineering challenge for kids. How should we position the sticks? Which path will the marbles take? How