The road to a healthy weight and way of living isn't always a smooth one. It's completely normal and even expected for your child to occasionally lapse into old habits and make a poor dietary choice or skip exercise in favor of an afternoon with the Cartoon Network. The important thing is to prevent stumbles from becoming permanent falls. You can do this by making sure your child understands what causes unhealthy choices and by helping him move forward without guilt or other emotional repercussions that may paralyze his motivation and sense of self-worth.