The SolarSpeeder Kit from the Maker Shed is a really fun kit to make and race. The kit comes with detailed instructions, and is easy enough for even a beginner to assemble. I really like the contoured circuit board, especially the gold flames. It really was amazing how fast this little solar racer ran across the floor after just a minute or two of charging. Next I have to try out some of the upgrades. I'll keep you updated. Available in the Maker Shed at http://www.makershed.com