More ideas from Ira
Engineering Project for Kids:  Build a Straw Roller Coaster!  Use straws to create a track that a ping pong ball will roll on. Fun STEM challenge for kids!

Build a roller coaster for a ping pong ball out of straws, hot glue, and a cardboard box for a base. This STEM challenge for kids is awesome because the materials are so simple and inexpensive! The track is surprisingly sturdy, and kids will have a blast

Leonardo da Vinci's self-supporting bridge (parametric) by pjotrx - Thingiverse

This gives you the basic parts to build a self-supporting bridge, as conceived by Leonardo da Vinci. For a simple bridge, 5 notchless and 10 notched b

12 Amazing DIY Backyard Games to Build Right Now! - DIY Passion

I'm excited to be sharing tutorials for 5 DIY Yard Games: Yahtzee, Dominoes, Scrabble, Cornhole and Jenga this week and next.