Those of use who know from experience can safely say there's nothing quite as much fun as a homemade rocket. But part of that fun is not getting your hands blown off. Nighthawkinlight has a fun, easy way you can get the best of both worlds, and "recycle" your old water bottles in a literal blaze of glory. More »

If you're tired of crowding around a laptop or smartphone to watch a movie or video clip, this DIY projector will throw it up on the wall for all to see. Plus, it should only set you back about $5 in parts at your local hardware store. More »

Useless machines are home-built devices that turn themselves off as soon as you turn them on — and that's it. That's all the they do. The more elaborate and gimmicky the method by which they accomplish this job, the better. As a hobby, useless machines have been around since the 1950s, but Abigail Pesta of the Wall Street Journal says they're making a comeback.

My laptop isn't administrated on a network that runs night updates, and I don't use it as any type of server, but for some reason I leave it on for days at a time. Okay weeks. Okay it's been like two months. More »