Part iv, episode 2 1. JOJO went to the dentist in episode 2 1, the fourth part of this cartoon. After eating snacks, you should brush your teeth to drive away cavities, and enlighten them at the right age so that parents and children can learn. The baby's growth starts from many firsts, the first time he learns to talk and the first time he learns to walk. The importance of teaching children to brush their teeth. If they don't brush their teeth, they will get tooth decay.