The Oral-B Kids 3+ electric toothbrush heads give kids the fun of Disney Frozen with the gentle, effective clean of a dentist-recommended Oral-B toothbrush. The extra soft bristles and small round head are specifically designed for kids and they are compatible with all the Oral-B Kids electric toothbrushes.Specifically designed to be gentle for kidsRound brush head sized for small mouthsGentle on gums with extra soft bristlesSuitable for ages 3+Dentists recommend changing the brush head every 3 months to keep an optimal cleaning efficacyCompatible with all the Oral-B Pro Kids electric toothbrushes.