Mitchel Resnick has made a career out of making learning fun. His research group at MIT developed the programmable brick technology that inspired LEGO Mindstorms, plus the kid-oriented programming language Scratch. Resnick also co-founded Computer Clubhouse, a network of after-school rec centers. Up next: ScratchJr, which aims to teach even younger children (younger than age 8) how to program. It’s in prototype stage, and a public release is planned for later this year.