CNN | Wiring the world to fight childhood obesity.

When 14-year-old Benjamin Ring walks his dog, Jasper, he earns 200 points. When he runs a mile, he gets 500 points. If he hikes with his family or walks to school, he racks up “pointz” that he can redeem for prizes. “It’s like a real-life upgrade,” the eighth-grader from Piedmont, California, said about the game Zamzee. So far, the bespectacled teenager has 47,074 pointz which he has redeemed for Legos and $150 worth of Best Buy gift cards. Continue.