Not all kids have an interest in sports or traditional exercise.
Lifehacker recommends these motivational approaches to encouraging your kids to move around and love it. Here are some activities that could help engage kids and get them interested in exercising:
Dance Lessons
Gymnastics
Golf
Martial Arts
Fencing
Ultimate Frisbee
Tennis
Yoga
Skateboarding
Swimming
Rock Climbing
Snowboarding
Dodgeball
Obstacle Course

According to Lifehacker, the key is not pressuring kids and finding something that they enjoy doing and are engaged in. Identify the things they enjoy and try to incorporate that into activities you plan for them.