Sorry, not Parallax, not even electronics. But if you need a last minute gift, here's a $20 Sterling Cycle engine that runs off your mug of hot coffee. Seller is in Kentucky (most at this price are shipped from China) so there's a chance it will arrive before Christmas. I just ordered two, one for my brother and one to hoard.
ANYBODY WITH A COOL NEW COFFEE MUG needs one of these!
Maybe someone smart will add a magnet & coil and blink an LED... or power a Prop...!
Forum issue: recently when I "insert picture" I get 4-8 duplicates and must delete. Anyone else?