What better way to remind your child that she/he is on their way to obesity than to present them with a pair of FATS (Fitness Achievement Technology System) shoes. Created by students from the Utrecht School of Arts in the Netherlands, the more the kids work out, the more the color appears. This is accomplished by a motion sensor integrated into the shoe’s heel that, along with glass fiber yarn woven on the outside, reflects the light from LEDs. While we think that most kidlets we know would prefer being rewarded with a twinkie or more video game time for exercising, we suspect that this prototype may work on the same little ones that wear those blinking light shoes for safety reasons.