The Droid Developer Kit is a pretty cool set. The R2-D2 looks really good, and the Jedi Knight Droid's claw is a really neat feature. The coolest set though is the Battle Droid on the STAP, for which the instructions are online <a href="http://www.mindstorms.com">here</a>. It looks great as a LEGO model and when you shine light at it, it tips to the side and falls off of the STAP. It's a really good set for beginners with the more advanced sets, but if you want to do more, you can build in the RCX from the Robotics Invention System and do even more with the kit. A fun kit to add to any collection.