Segway balances itself, runs forward, backward, in circles. Marvelous creation, and it should be for a mountain of George Washington's.

Now consider the Legway, a Mindstorm bot for a Benjamin or two, that does the same things. Lean the table and it stays balanced. It can follow a line. It's a real robot, not remote controlled. Learn more about it at http://www.teamhassenplug.org/robots/legway/
where you can learn how to build your own.
And that's not even the new Mindstorm system!