1. Once upon a time, there was a child named Xiao Ming. He was good at everything but didn't like brushing his teeth. His teeth were all decayed and he kept going to the hospital for injections and treatment.

2. Later, his father made up a nursery rhyme for him: little teeth, protect them; little ones, brush them in time; teeth are white and beautiful, no injections or treatments are needed. Xiao Ming couldn't resist the temptation of his father's nursery rhymes, so he asked his father how to brush his teeth. His father said: "Brushing your teeth is very simple, and the general time is controlled at 3-4 minutes. However, you must pay attention to not brushing the toothbrush sideways, but along the gaps between the teeth, and do it carefully." Brush them inside and out to keep your teeth clean and tidy." After hearing this, Xiao Ming suddenly realized and said: "I know. From now on, I will brush my teeth every day to make them clean. That way, the moths will never come again."

3. "Well, you are such a good and sensible boy!" Dad said happily.

4. Since then, Xiao Ming has not only learned to brush his teeth, but also taught children’s songs and brushing methods to other children who don’t like brushing, so that the children can brush their teeth happily, and tooth decay has been eliminated since then. Missing!