Pianos are huge. That’s make it impossible to just play one whenever you like. You have to be in a room with a large piano to play it. You can’t just pull one out of your pocket whenever the mood strikes you. That used to be true, but now you can play the piano anywhere and you don’t even need a piano thanks to the Japanese Wrist-Mounted Finger Piano.
Just put this on your hand and get playing on any surface. It features three volume levels and three sound banks: piano, bells, and cat. You will be an instant mobile Mozart.
It takes 3 x LR44 Batteries, which are not included. Now nothing can stop your music. $39.99 from Thinkgeek. That beats the price of a piano.