Last year we started experimenting with he Bioloids Kit. Its a very powerful set of motors and a small computer that enables us to do some pretty neat things in ES451Mobile Robotics.
We had a good time with the 2nd annual "Worm Chariot Races"
Simple walking behavior are possible.
You can program the to react to their surroundings too.
Let's not forget about the Dancin Queens
And the dirtiest dancer of them all?
Seriously?