We. Took our kids when our youngest was 5. We went for a few hours at a time and went back to the campground for a rest and/ or kid-friendly activities. He was fine. He loved looking at the"Army men" and even enjoyed the films and diorama. One of our favorite memories is of him insisting we write a note to a current "Army man (or woman!), then signing his name. They had postcards you could send there (I don't recall what group sponsored them). He was bored at times, but overall, it was fine. The older kids loved it and we are going back this summer. Thanks for all of your tips; I've included Hershey Park to the agenda!