Please update this article to reflect recent events or newly available information. This is a list of Lego Star Wars sets, based on the Star Wars franchise. Two Lego Mindstorms sets have been released before 2002. The first set featured R2-D2 which can also be converted into a Battle Droid on a STAP and a Treadwell droid. It is called the Droid Developer Kit and was Released in 1999, numbered 9748, and contains 657 pieces. Until recently, only single characters were released as keychains.