tones
Tones deaf
Perhaps one of these might help?Mate, they've said they're going to teach children aged 3-5 how to brush their teeth. What more do you want?!
US20070094822A1 - Musical toothbrush - Google Patents
A toothbrush assembly comprises a toothbrush, a storage unit comprising an input, a memory for storing audio signals received via the input, and an output for transmitting or playing the stored audio signals. A variety of different embodiments of storage unit and toothbrush configurations are...
patents.google.com