Fitbit’s Motivator

The slim device also features a small button on its exterior that flashes several displays when pressed: total distance traveled by the wearer, number of steps taken, calories burned, and somewhat mysteriously, a slender blue flower.
The height of the flower correlates with how active and healthy the wearer of the Fitbit is. Ran a mile during lunch and ate a healthy lunch? Your bud will unfurl and stretch along the length of the device. Stayed out late partying Saturday night and spent Sunday buried in a pile of pillows? Your flower will wilt and shrink.

http://bits.blogs.nytimes.com/2009/12/10/fitbits-motivator-a-virtual-flower/