Great Scott! 1.21 Gigawatts

For the time traveler on your holiday list, you can go over to O”Reilly Auto Parts and pick up a Flux Capacitor along with a Mr. Fusion upgrade kit so you can use everyday trash to generate the 1.21 Gigawatts you need to travel back to 1955.  DeLorean not included. :P

Via Geeky Gadgets