Oral-B Stages 2—A toothbrush designed for children ages 2 to 4 years. At this stage, children are learning to brush, and their baby teeth are still growing in. Because their mouths are small and their hands unsteady, it’s important to choose a brush just for them. The Stages 2 brush suits their special needs. Dentists recommend changing your brush every 3 months. *Not for children under 2 years of age. Adult supervision required.