Pull it back, let go, and watch it zoom -powered by nothing but a rubber band and the science of stored energy.
Build your own soapbox racer and launcher, then put it to the test. The further you stretch, the more energy you store, and the moment you let go, it turns into pure speed. No batteries, no engine.
Then comes the fun part: mix and match the themed carts and drivers to build the most ridiculous racer on the track.
