Pocket Pikachu
The pocket Pikachu, created by nintendo is a virtual pet game, a bit like a tamagotchi, except its pikachu!
Its about 3-4 inches big, yellow and has similar controls to a gameboy pocket/colour.
With a built in pedometer which counts the number of steps, jumps and movements you make. The more you make, the more points you will get. It has built in games, and you can get watts by playing these games!
Watts are what pikachu gets when you walk around, or what you win on the little slots game.
You have to give these watts to pikachu in order to make it happy. The whole point is to keep pikachu happy all the time all the way through the day. It includes a built in clock and alarm which will wake anyone up in a morning.

Its definately a great little unit to own, but its colour sequel is even better!