I didnt see a sign stating amy age limit. I have seen young children there before. Not sure how old they were. Id call and make sure before standing in the line though.
I don't think a 4 year old would handle it well... I have seen 10-15 year old have to be escorted to a safety exit due to emotional breakdown. Yet your 4yr old might be young enough to be convinced its funny and fun. Tough call. Have a blast!
Thanks! Your answer is awaiting moderation.