The hum kids by Colgate Smart Battery Powered Kids Toothbrush uses Augmented Reality to guide kids to brush better. Game experiences make brushing fun, while helping your child learn good lifelong brushing habits. Parents can track your child's progress and easily check if kids missed a spot or brushing session on the parents section. This extra soft toothbrush for kids is recommended for kids ages 5+. The app teaches kids where & how to brush and helps your child establish good lifelong brushing habits. Rewards good brushing by unlocking new levels and game experiences as your child brushes. Replaceable extra soft toothbrushes: Replace the gentle and effective toothbrushes to keep them as fresh as your child's mouth.