The NUBY™ 5 Piece Tooth & Gumcare Set promotes the early development of good hygiene. The soft materials and bristles are designed especially with a child in mind. The first stage allows parents to brush and massage gums gently while the second massages and helps gently cleans as teeth begin to erupt. The third stage massages and cleans during the teething process. The stage 4 Bristle design provides a smooth transition.