Here are some tips on getting your child fit from U.S. News & World Report:
Encourage a little bit at a time. Minutes spent playing kickball can add up over the course of a day.
Advocate for well-maintained, safe sidewalks and bike paths in your neighborhood. Volunteer to supervise the use of school facilities after hours. Children are more likely to want to play outside if it's safe.
Practice what you preach. It's not hard to find activities the whole family can do together.
Don't underestimate the value of some video games. So-called "active-play" video games can encourage regular exercise.
Don't let other activities or physical disabilities limit your child. All children need exercise every day.