The Browns Brain Shadow Chaser! A wonderful robotic toy for those who like to learn and experiment with electronic things. It can follow, chase and push a ball across the floor.  experiment by redirecting its' sensors and using different objects for it to follow - even a dark line on the floor.  Kids love it.

Uses one 9 volt battery.
Fits in your hand!
$10 Canadian and it comes fully
assembled and tested!
And it's kinda cute too.

The origonal white. The NEW DOME. The NEW GOLD.
more info.             Browns Brain