After continuous modification and discussion, the final appearance is roughly determined, and in the design process, it is constantly overturned and repeated, constantly understanding and demonstrating the scenes and actions of children in the process of using toothbrushes, and finally determining the use of bracelets and silicone bottom sleeves to meet the needs of different age groups. Before the age of four, the tail bracelet assists the child to hold the toothbrush tightly, so that the small hand "delicate" cannot hold the toothbrush and often falls off. After the age of four, when the bracelet is not needed according to the needs, replace it with a silicone bottom sleeve.