Oral-B Pro Kids Replacement Heads with Spiderman, 3 heads – Designed specifically to be gentle for children. Round head for small mouths. Gentle on gums with extra-soft bristles. Suitable for ages 3 and up. Dentists recommend replacing the head every 3 months for optimal cleaning effectiveness. Compatible with all Oral-B Pro Kids electric toothbrushes. Oral-B, the most used toothbrush brand by dentists worldwide with clinically tested results – The Oral-B Kids electric toothbrush for ages 3 and up offers children the fun of Spiderman with the effective and gentle cleaning of an Oral-B toothbrush recommended by dentists. The extra-soft bristles and small round head are specifically designed for children and are compatible with all Oral-B Kids electric toothbrushes.