Overall, it works for me as an adult something cheap to the touch when you hold it in your hand it seems not very stable. Here I'd better material processing and a higher-quality performance at the price expected.
Otherwise, the toothbrush always sounds like my shortly before the battery is empty. This is probably just due to the lower intensity and not objectionable.
Overall, I can issue a buy recommendation. The psychological effect of the colorful characters and the music to the children and toothbrushing behavior is not to be underestimated.