One word of caution: if you have a very tall robot, be very careful about going up high in small spaces. In high school, we ran a couple of demos using our 2001 robot, which was about 13 feet tall, and very unstable. The first time we used it, we were using it to pick up a garbage can, and tipped the robot over, leaving a big black mark about 10 feet up on the wall. The second time, we almost tipped the robot over on top of a small child

Needless to say, that was the last time we ever used that robot for demonstration purposes.