If you enjoy these project, then I encourage you to buy my book, Rubber Band Engineer. It's full of more awesome and original projects crafted from household hardware. You can find it wherever books are sold.
Everything I make: LanceMakes.com
We've all heard of the classic egg-drop engineering challenge, so here's a twist: crash test race cars! The students in my extracurricular engineering class love this project because of its open-ended nature and thrilling process.
More footage of crash tests