Build This Wave Machine With Duct Tape, Kebab Skewers, and CandyRobbie Gonzalez12/03/14 1:48pm914EditPromoteDismissUndismissHideGo to permalinkA lot of people use Slinkies to introduce kids to waves. But Slinky waves can move too fast for people to really wrap their heads around. Instead, science teacher and filmmaker Alom Shaha suggests, they should try this wave machine. You can build it yourself, and you can do it on the cheap. Here's how.