Wisdom Step by Step Tooth Brush for Kids 3 – 5 years help a good brushing. Step by step 3-5 years is specially designed for cleaning milk teeth. It has a compact head with raised tip, easy-to-clean milk teeth and a bumper to help protect delicate gums and brush. The ergonomic handle provides a firm grip for adults and for children to learn, brushes. It can also be beneficial with a built-in hygienic stand for store and carry when not in use.