My friend Jimmie Rodgers (creator of the Arduino-powered Open Heart kit) turned me on to these awesome self-color-changing RGB LEDs you can pick up on eBay real cheap. I took 45 of them and made a strand of lights for a small artificial tree and the lights are truly trippy. Check out the Instructable for this. It’s cheap and easy to make these (it cost me no more than $50 including the tree).
Color-changing RGB Christmas Tree Lights Instructable
In the Maker Shed:
The Best of Instructables Volume I
Instructables.com has become one of the most popular magnets for makers and DIY enthusiasts of all stripes. Now, with more than 10,000 projects to choose from, the Instructables staff, editors of MAKE magazine, and the Instructables community itself have put together a collection of technology, craft, food, and home how-to’s from the site. The Best of Instructables Volume 1 includes plenty of clear, full-color photographs, complete step-by-step instructions, and tips, tricks, and build techniques you won’t find anywhere else. Over 120 projects!