Rubber bands have long been known to be one of the cheapest, most accessible ways to transform potential energy into kinetic energy. You probably have some within two feet of you right now. Incredibly ...

When you were a kid, did you ever have one of those toy race cars that was powered by a wound-up rubber band? If you did, chances are it wasn't quite as striking as Cirin. Modeled after mid-1950s ...

There are lots of ways to make a rubber band car using things from around the house. This design takes a few clever turns to the classic toy, including one that would be near and dear to any rubber ...

brainstorm solutions to design challenges. build, test, and evaluate a rubber band-powered car. communicate the design approach to others. distinguish between potential and kinetic energy. spring ...

Look, over there. Under that blue tarp in a suburban driveway. That thing that's the size of a Smart car? It's Joel Waul's rubber band ball. Waul has spent the last six years carefully wrapping and ...