Oral B Stage 1 Toothbrush - Disney Baby Stages 1: A toothbrush for babies 4 to 24 months. At this stage, babies begin to teethe. When the first tooth comes in—usually between four and six months—it's time to start brushing. The Oral-B Stages 1 toothbrush makes it easy to gently care for new teeth and tender gums. Disney baby toothbrush styles and colors may vary. Please let us choose for you.