Musical shirts are all the rage these days. You can make yourself one of these wearable toy piano shirts and then get together with someone who has the Electronic Drum Kit Shirt and start a shirt band. Unfortunately the piano shirt is just a one-off made by a crafty modder who basically gutted a toy electronic piano and sewed it into the fabric of a shirt. It was shown at the DIY Festival Zurich and it looks pretty cool. I’d buy a shirt like this without the piano innards.
Here’s a video of it (with incredibly low sound, you might need to crank it up):
instructables via make