ThinkGeek.com is a great resource for geeks to buy awsome shirts with inside jokes, clocks that require knowlege of binary, fun stuff to mess around with, and just plain cool gadgets that could entertain one for hours. I especially like the mockup lightsabers, the L.E.D. Clocks and the "theres no place like 127.0.0.1" t-shirt XD . prices are also pretty fair, while some items are pretty expensive most are fairly affordable. the extensive selection of items also has quite a variety of items to choose from.