Technology experts at the National Taiwan University have applied a "learning through play" approach to make it fun for children to brush their teeth. Using a webcam, which can be mounted on the wall above the bathroom sink, the movements of the "Playful Toothbrush" can be tracked in three dimensions and the data fed into a computer. The computer distinguishes the orientation of the brush, and can also track its x-axis "roll" and z-axis "yaw". The game basically displays a set of graphic colourful teeth which become white as and when the child mover his/her toothbrush over the teeth. By this fun and interactive way of brushing teeth, children were actually brushing the teeth as shown by the researchers data. Check out video below.
Source : New Scientist
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