Make your own pinball machine. The art of pinball machines is in decline, but some folks endeavor to keep it alive. From the basic, to the the full blown experience, these guys do it their way. DIY pinball goodness.
Build your own Rocket Belt (Jet Pack)! Jealous of 007 in Thunderball? Missed that eBay rocket belt sale a few years ago? Have a lust to fly like a bird (sort of) with a real rocket belt? Then build your own rocket belt just like Stuart Ross. Watch out for stuck throttles (avi file) though.