After user research, this children's electric toothbrush starts with cartoon image. In the design process, considering the ergonomics used by children, as well as the problems of material safety and skin-friendly, food-grade materials are selected, and the three-gear vibration frequency suitable for children is adjusted through continuous testing and modification in use. At the same time, in order to increase the freshness of children. The silicone jacket and the main body adopt a separate replacement design. The shape and color of the silicone jacket can be changed at any time to solve the problem that a long-term use of the shape makes the child lose interest, so as to keep the freshness at all times. And without the use of silicone jacket, it can be used as a small product featuring female users.