Parents are the most important role models for children. One in 10 children are overweight and out of shape largely due to inactivity and junk-laden diets. Teaching healthy habits at an early age is important because change becomes difficult with age.
Do activities with your child that promote healthy eating such as the Arthur "Healthy Snacks" activity.
Use this game from the United States Department of Agriculture to teach your child how to make healthy food and activity choices.
Kaiser Permanente has a wealth of resources for parents to help their kids eat healthy and stay active.