in the level "Through the Jundland Wastes" go into the Jawa Sandcrawler. go to the room where you have to push boxes into holes to unlock doors. DO NOT KILL THE DROIDS! there will be a few doors on the left, one in front of you, and one on the right. push the first box into the one on the right. go and unlock the other doors and then come back to the one on the right. The droids Should be jumping up and down and dancing in the tiny room.
Lego, Star, Wars, The, Happy, Droids, Treadwell, R1-G4, Droid, Jawa, Sandcrawler, Jump, Dance