Review (1/5): Doesn't really vibrate easily--Flawed manufacturing
Cheep, made in Big Foctory with no attention to flaws. It only vibrates if I try to put firmpressure and bend the bristles toward the handle, which is the opposite bend that happens with the pressure on the brush from the action of brushing hair. The wiring inside is clearly not quite right. My 4 year old likes it, though, and it is an interesting lesson for all my kids in how something can be flawed, off, and poorly manufactured with no quality controls to ensure it works right.