Electronic dice

A 6 led dice roller. Generates a random number and displays it on the LEDs. I saw a cool one that included a shake-generator (magnets in tube with a coil) so that the shaking action triggered the random number generator and powered the device.

http://hackaday.com/2011/09/14/attiny-hacks-look-ma-no-batteries/

Might be cool to hook this up to 2 7-seg LEDs and put a small rotary on it for 4, 6 2x6, 8, 10, 12, 20, 100.

It might also be possible to hook a small motor up as a generator and have a spinner to create power. Off center weight could be used to give it the dice shake feel.