After watching the musical The Music Man, my mom brought out an egg carton, a dishwasher detergent container, and a cereal box. She told us that we can try to think of an instrument to make out of them.
I cut of the top of the egg carton then cut two holes on one side of the bottom of the carton, and one hole on the other side. I decided after that to braid a strap that can tighten and loosen and attach to the holes. I used a broken wood crochet hook that I sanded to rub against the bottom of the egg carton. It made a really cool sound! I need to come up with a name for it...any ideas?