Edited— tried and returned
***Drop from 3 stars to 2. I have since returned this product. After about 10 uses the mouthpiece would not stay on. Might be ok for an older kid that would understand how to hold it better.  Also hard to explain to a younger kid that you still have to move it back and forth.  Not just let it vibrate.***<br /><br />I was not sure how my 3 1/2 year old's would take to this.  I did not want to buy the expensive one with blue and red lights that actually have a function.  The blue light on this one is just "for fun".  This item charges by a plug and usb.  I would not really feel comfortable submerging it in water.  Nothing protects the charging hole.<br /><br />So far day two my twins like using it. They don't really keep it in their mouth as long as they should.  I am not really sure if it is brushing their teeth either.  You are supposed to move it back and forth while it vibrates and I think that is hard to explain to a toddler who wants to bite down hard on it.<br /><br />I am going to try the bigger mouth piece on myself for a few days to see if I feel it does the same as brushing.
Rating: 2 stars