What I'd probably do is use it to control lights in the bathroom. You're supposed to brush for at least some amount of time, change the color of the lights as you approach that time.
My Oral B toothbrush came with a little digital clock that sticks on the bathroom mirror, when you start the toothbrush it switches to a timer that counts up, with a little quadrant indicator that changes every 30 seconds.
It also apparently grades how well I clean my teeth, but that appears to be based purely on 1 star per 30 seconds, up to 5 stars.
It also apparently grades how well I clean my teeth, but that appears to be based purely on 1 star per 30 seconds, up to 5 stars.