We bought one of these and it had the desired effect of encouraging our 6 year old to brush his teeth more, for a while at least. We bought the Disney Cars version, which he loved. However there are two down sides to this brush. First, the replacement heads are expensive and not very easy to get hold of, so be prepared for that, and secondly, the battery compartment doesn't work very well. We found that it was fine at first, but after a while it became increasingly difficult to remove the bottom of the toothbrush and then replace it to change the batteries. After several struggles with this, the batteries would no longer connect to make the toothbrush work. If you're thinking of buying one of these toothbrushes, I would really recommend that you buy the rechargeable version (it has a two pronged plug), rather than this battery operated version. The toothbrush works fine and the disney novelty is an encouraging plus.