The Amazing Frisbee Black Box or BASIC Stamp Frisbee
Is it a bird? Is it a plane? No, it's a computerized Frisbee with a BASIC Stamp!
Be the envy of your colleagues with this über-nerd coffee mug that generates power from heat using the same energy converters that are used on deep space probes! Equipping a mug with thermoelectric energy converters and heatsinks will allow you to drive a small motor or other electrical device. You can even claim to be environmentally responsible by extracting useful work out of heat that would otherwise just go to waste.