For an introduction to electric toothbrushes that I wanted, it is just what I needed (price of 6 euros). Moreover, it even included Energizer batteries that I didn't expect. The negative aspect of it, I think, is its weak/slow brush. Also, with a small groove, I removed the lower part of the bristles [static] so that the child can perceive the moving parts more easily and be able to guide the brush to all teeth with greater sensation.

Very good! We changed its battery when it ran out and kept it for longer because initially our little one had it for playing until he got used to brushing his teeth!