How to approach?

[Crayola kiddies]

Feed him smaller portions and only give seconds of veggies(fruit is loaded in sugar) keep the carbs to a bare minimum (none if possible cause he's probably getting more then enough at home) When outside create games that include lots of movement such as tag, obstacle courses, follow the leader. Go for long walks and don't put him in a wagon or stroller..... He walks. If you don't have a play structure in your yard then go to a park that has one and get him climbing. Inside play movement games or turn on the music and do lots of dancing. This coupled with only a few carbs and lots of veggies should get him to lose a few pounds. If you have a scale put him on it and then reweigh him every two weeks or once a month to see if it working.