Kids brush 38% longer when using a Spinbrush battery-powered toothbrush vs. using an ordinary manual brush. Great handle design make brushing fun! Promotes healthy brushing and good dental hygiene habits; removes plaque, massages gums. Smaller toothbrush head for smaller mouths. Ergonomically designed for a comfortable grip. Batter-powered: includes 2 replaceable AAA batteries. Children under 3 use under adult supervision.