The Signal Kids Toothbrush can clean hard-to-reach places and cleans better at the gum line than a manual toothbrush. These colorful toothbrushes are a great way to get kids to brush their teeth. Deposits are the source of many dental and gum problems, but they can be removed. Removes odor-causing germs from the tongue and stimulates the gums. Removes plaque from larger spaces between teeth and along the gum line. Manual toothbrush bristles massage, stimulate and clean the gum line. Replace your Signal toothbrush every two to three months.