ESPN club is a must do for us every trip. each time i have always seen families with chldren of various ages and they didnt seem out of place.
as was mentioned in earlier posts there are TV's all over the place, smaller ones in your booth and you can get video game controllers, i believe it is playstaion, to keep them occupied.
it is an easy walk from the international gateway, about 10 minutes or so. well maybe a bit longer in the summer heat.
good place for kids and parents alike.