I'm not sure there is a rule. I know that NYS law has supervision criteria about children left alone. Nys museum used to have a daycare. I don't know they still do.
I'm not sure about THIS but I think that if you're under the of 16 you should've adult supervision but I would definitely call the museum just to make sure because I don't want to give you the wrong information
I'm pretty sure it's 16
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