Watch out for a duel of the robotisaurs. Mattel is introducing a toy dino that seems poised to take on Pleo, a long-awaited favorite of gadget-hounds. Like Pleo, D-Rex has soft, rubbery skin, a sensor on his head to detect touches, and a tail that wags when he's happy. Unlike Pleo, however, he doesn't cost $350, and seems aimed more at fun-loving kids than tech-loving adults.
Mattel D-Rex, $150, Available Fall 2008
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.