Lego Mindstorms Robotics Invention System 1.0 (1998)

A do-it-yourself robotics system for the masses, Lego Mindstorms made building machines more fun than should be allowed. An interactive community helped promote different designs and creativity, so you were never at a loss as to what to do with all of those Lego pieces and parts. And one of the early expansion kits included a robotic R2-D2. (Sure, it was just a wireframe, not a solid replica, but it could still carry your Coca-Cola can.) Photo courtesy of the Lego Group.