Nothing says amateur like magic-marker notations on your recorded CDs -- or glued-on labels, for that matter. Now you can print directly onto the discs. You just feed a CD through the 2,880- by 720-dpi EZ/CD Print inkjet printer, which also accepts regular paper and stickers. Price: $400.
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.