Inflatables! What a cool way to get a lot of R2 for your money. This
Star Wars R2-D2 Inflatable R/C has a large Weeble-like body that wobbles without falling over even when going down stairs. Puffed up full of air (foot pump included), R2 measures over 2 feet tall and is controlled by wireless remote from up to 25 feet away.
Indoor or outdoor use. Is this the droid you were looking for? (come on, you knew that line was coming somewhere in this post) May the Force be with you.