We always love hearing from passionate, scientific-minded kids, and 13-year-old Riley Lewis, a burgeoning 3-D printer expert (and PopSci reader!) is certainly that. Riley showed interest in fabrication and Maker culture, so Deelip and 3D Systems hooked him up with a RapMan 3.1 3-D printer kit that he's set up at his Silicon Valley school--and Riley in turn has hooked his classmates into discovering the potential of 3-D printing with him.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.