Protect and clean young teeth with Aquafresh Advance Kids Toothbrush 9-12 Years. With interdental bristles for those hard to reach areas. Aquafresh Advance Kids Toothbrush 9-12 Years is specially designed by dental experts for children 9-12 years. It has soft bristles with different lengths to help clean the new permanent teeth and existing milk teeth and gently remove plaque. Aquafresh Advance Kids Toothbrush 9-12 Years Gentle toothbrush Suitable for children aged 9-12 years Soft bristles Has interdental bristles Gently removes plaque.