I have a 9 yo and we only went one year, when DS was 3 or 4. It seemed to be mostly for younger kids and it was crowded as hell. And hot. Thought it was kind of miserable. DS never asked to go back. I'm sure if I asked to take him now he'd say it was for babies. That said, if your DS has
never gone and/or doesn't go to the museum often, he might think it was cool