For most of us, tablets are toys, irresistible little windows onto a constellation of videogames and streaming video. The OLPC tablet‹a collaboration between One Laptop Per Child and Marvell‹is for kids in developing nations, but it's not a plaything. It has all the best features of its laptop processor, including a Linux-based operating system, a rugged design, and the ability to recharge through solar panels or a hand crank, but at a targeted price of $100, it'll be nearly half the price. The product is ready to go into production as soon as a willing partner signs up.