A kids toothbrush timer using an Adafruit Circuit Playground Arduino board with 3D printed lips to turn it into a mouth.
This is a fun and useful project to make with kids.
You can find full instructions for making the toothbrush timer on our website: Making a Toothbrush Timer with an Adafruit Circuit Playground board
To complete the project you'll need an Adafruit Circuit Playground board with a JST battery box and batteries and a magnetic pin back. You'll also need two mini red cable ties and a mini velcro cable tie.
A speeded up demo of the toothbrush timer in action.