If you're a die-hard tinkerer, you know that often what you need more than any fancy tool is a good light source to aid you when you're performing a delicate operation. These DIY forearm lights aim to get you that light.
All you'll need to get started are some AAA batteries, some velcro, a few LEDs, hot glue, a collection of various conductors, resistors and electrical tape, and some time on your hands. When you're finished (if you've got the chops for it), you get some really cool, very bright helper lights that fasten to your forearms.
An extra bonus: As a child who grew up holding flashlights underneath cars, behind entertainment centres, and up to the occasional riding lawnmower, I can't imagine a better DIY gift that would serve both the giver and receiver.