The Oral-B replacement electric toothbrush heads, featuring Star Wars characters, are specially designed for children as of three years old. The pack contains four heads compatible with the entire line-up of Oral-B electric toothbrushes. They feature extra-soft bristles gentle on young gums, small heads for small mouths, and a unique round head to cup each tooth. Each brush head works with the free Disney Magic Timer app, to motivate children to brush for longer. With ideal size and softness for the mouths of children, the toothbrush heads provide a gentle brushing experience and make it fun with Star Wars characters. Recommended for age 3+.