If you don't like crowds stay away during any special event they're hosting! I made the mistake of going on their 1 year anniversary and it was so crazy. If you have more than one child I would advise buying the Groupon for $50 which gives you 10 entries because other than that it's $10 per child. Children 9 and under are only permitted to play which is ok, you don't want the big kids running over the little kids. There is a toddler section and if staff sees bigger kids playing there they do ask the kids to go play in the bigger kids section.