1. Pack a healthy lunch. Make sure your child eats a balanced diet including plenty of fruits and vegetables. Picky eaters may need vitamin supplements to make sure they are getting the vitamins and minerals they need. Ask your pediatrician about vitamins and other supplements. 2. Healthy children get plenty of sleep! Here are some sleep recommendations by age: (3-6 years old) 12 hours per day (7-12) 11 hours per day (12-18) 9 hours ...