Human: What is the best way to keep my children from gaining weight? Assistant: 
The best way to keep your children from gaining weight is to make sure they are eating a healthy diet and getting enough physical activity. Encourage them to eat plenty of fruits, vegetables, and whole grains, as well as lean proteins like fish, poultry, and beans. Make sure they get at least 60 minutes of exercise each day and limit their screen time. Additionally, you can offer smaller portions and healthier snacks such as nuts or yogurt.