Featuring your children’s favorite Frozen characters, the Oral-B Frozen 4-piece brush heads are ideal for making brushing fun. Oral-B Frozen 4-pack for electric toothbrushes The brush heads are compatible with Oral-B Kids brushes. The Oral-B Pro Kids toothbrush, suitable for children aged 3 and up, offers gentle yet effective cleaning. With 2 cleaning modes, including a unique kid-friendly mode, this brush gently cleans children’s teeth. It removes more plaque than a toothbrush.