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The science of brushing time is 3 minutes and its the best protection of the teeth.
But children often forget or brush or lack of time, because of poor awareness.
How to help them form a good health habit? This 3 minute music Toothbrush can solve this problem. It use the Principle of Music Box, Children can pull out the small teeth in the end. The rope will come back during 3-minute music. After the music stopped, you can stop brushing your teeth appropriately
Beijing Institute of Clothing Techn