How does the hum kids by Colgate smart manual toothbrush detect my movements?

hum kids by Colgate smart manual toothbrush uses augmented reality to analyze the way your child is brushing by providing an interactive experience of a real-world environment "augmented" by computer-generated perceptual information.

The hum by Colgate app uses the front-facing camera of any mobile device (phone or tablet) to detect which area of the mouth your child is brushing. By brushing in different areas, your child will control the hum kids brushing game.