If you are having trouble about what you should and shouldn't eat, consult with a doctor or friends. Sometimes it can be hectic to eat nutritious when there is so much information out there for you to read. Asking around can help you understand what it is you should be putting into your body to keep it running healthy.
You want to try and keep a routine with your kid's meal times. Try to serve meals and snacks at roughly the same time every day. Let your child have juice or milk at meal times only, and drink water the rest of the time. If they drink juice and milk all day, they may not have an appetite later.
Make sure to eat fruits and vegetables with your meals and throughout the day. By eating these you will be able to eat healthy snacks and also eat fewer high calorie foods during your meals. You will be able to easily lower the amount of calories you take in each day.