Watch this video. Ellyn Satter will explain what the Division of Responsibility.
Parent's responsibility. Parents choose what (nutritious foods) and when (regular mealtimes) and where (location to feed their children).
Child's responsibility. Children choose whether or not they will eat and how much they will eat.
What to eat
When to eat
Where to eat
How much to eat
Whether to eat
No special orders (same foods for the whole family)
Serve at least one food you know each child will eat
Don't interfere in your child's natural ability to know when they are full (don't ask them to have one more bite).
Over time, kids will learn to like the foods the family eats