Abstract: The invention related to an interactive add-on device (FunBrush) for kids for a toothbrush and a platform for mobile devices containing games controlled by the device to create a habit of correct, regular tooth brushing by virtual fun. The device is attachable to a manual or electric toothbrush and comprises PCB board, battery, a button responsible for turning device on and off and controlling elements of the platform, microprocessor, wireless system (Bluetooth 4.0 LE), accelerometer, gyro, and magnetometer. The device is connected to an existing mobile device located on a toothbrush. A material for a cover is variable with TPE-V as a prototype material.