This is an interesting idea: an Electronic Rock Guitar Shirt sold by, of course, ThinkGeek.com. Have you ever wanted to play guitar on your shirt? Well, now you can. The electronic rock guitar shirt allows you to play guitar on your shirt. Each button on the shirt is a chord. To top it off, the shirt has a miniature amp attached to it. It sounds like something that would be fun to make, but probably pretty annoying in practice.
Music Evolution 