Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Tooth Tunes full of cavities

The fact that you cannot change the battery is really all that needs to be said about this lame device. My child handed a perfectly serviceable "tooth tunes" to me this evening and asked me to change the battery. He was disappointed and in a very different way I was too. So I broke it open to see that it is powered by three cheap AAA batteries. It could have easily been designed to make them replaceable - all they needed to do was NOT glue the stupid thing shut. Another unnecessary electronic device headed all too soon to the landfill. Thank, Tooth Tunes, it was great while it lasted.Get a regular toothbrush and turn on a radio.Steve Hynes