How to keep it "FUN"

Training for and participating in fun runs and walks(usually a distance of five kilometers or approximately three miles) can be a great family fitness activity. Parents serve as good role models while kids learn that physical activity can be a fun and rewarding social outlet.
To keep it fun:
~ Walk or run at your child's pace - don't worry about the time.
~ Let you child take a walking break if he or she needs it.
~ Start out slowly and remember that "easy does it".
~ Talk to your child throughout the run or walk and continually offer praise.
~ Frequently ask your child questions like : How are your legs doing? How are you feeling? Is this pace right for you?
~ Teach your child ato save some energy for a "kick" when you cross the finish line.
~ Give your child a big hug at the finish!

Source: Kids Running