Teach your little ones early on that oral hygiene is important and can be fun! Marcus & Marcus Kids 2-Min Timer Sonic Toothbrush extra soft silicone and nylon bristles are cut in a convex shape for the best care and comfort. The toothbrush will vibrate in 30 second intervals to indicate that it's time to brush another part of your teeth. , , The vibrations are strong enough for a deep clean, yet still gentle enough for sensitive little mouths. Comes with 1 silicone head and 3 nylon bristles head.