In this youtube video, it shows a robot cleaning up your lego pieces:
https://www.youtube.com/watch?v=5re7l2ZDxo4

This video show 4 different robots you can construct:
https://www.youtube.com/watch?v=85kI6oBSXHY

This video shows a mindstorm robot solving a sudoku puzzle in only 4 minutes!
https://www.youtube.com/watch?v=Mp8Y2yjV4fU

This amazing video shows a guy playing connect 4 with a mindstorm robot:
https://www.youtube.com/watch?v=CHvJKdcNX6k

A war between two mindstorm robots:
https://www.youtube.com/watch?v=ZnDNKDDwjpE