Use Three special brushes are designed for use from the beginning of teething up to 6 years of age. Using NUBY's first toothbrushes helps develop early skills for proper dental care. How to take (use) - First stage: Parents clean and massage the baby's gums. - Second stage: The brush is designed for gum massage and cleaning newly erupted teeth. - Third stage: The brush with soft nylon bristles is intended for cleaning teeth with already strengthened enamel. It is recommended to consult a pediatrician or dentist when to start using the third brush. The three brushes provide a smooth transition between the stages of dental care for children in their first year of life. Contraindications Specific contraindications are not listed. The product is made from safe, durable, non-toxic materials, certified in Russia, and complies with all GOST and SanPiN requirements.