Check out this inspirational video "Designed to Move". By encouraging your kids to be physical active you can give them back 5 more years to live.
We owe it to our kids to get them active EVERY day, teach them the importance of being active and help them find activities that work for them. Ask them what they like - kids will tell you. Then teach them how they can do what THEY like. Reassure them that today may be different than tomorrow but that's OK.