Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Over the years, the TE crew and I have had some fun with pneumatic ...

Our first inclination was to make a ping-pong-ball shooter out of wood and rubber bands. The prototype was easy to build, but not very accurate. When the rubber band smacked the ball, the ball flew in ...

Water balloon fights can liven up any boring summer day. When you want to get serious about winning, forget throwing them—get a water balloon cannon on your side. You can build this DIY project from ...