In less than five minutes, transform an innocuous lip balm into a precision rocket. And all you need is Chapstick.
Daniel Bauen of Engineerable.com is an inventor, engineer and all-around DIY wizard. He's built everything from autonomous robots to bicycle-powered tennis ball launchers.
We commend his simple engineering instructions on the Chapstick gun. It is one of our favorite ways to irritate the ones we love!