ThinkGeek has interactive tee shirts. Imagine playing the guitar or drums on your tee shirt or checking a Wifi signal. Now you can with ThinkGeek interactive tee shirts. The guitar tee shirt comes with a small amp.

Checkout the rocking video here of the guitar and drums tee shirts.

Product Features
Belt out your favorite rock tunes on this t-shirt based real playable electric guitar
Great real rock sound
Play all major chords
Strum by waving the included magnetic pick over the strings
Mini guitar amp speaker clips to your belt
Volume goes to 11
Adjustable tone knob
Electronic components are easily removed from the shirt for washing
Includes two magnetic picks
Picks stick to speaker grill for easy storage
Requires 4 x AAA Batteries. Not included