We had a reservation at 11 AM and we encountered what apperared to be a school trip full of teens. It was very stressful as they did not stop screaming, ran from one place to another, and crowded every single room. Also, one of their teachers moved us out of the line so all of her students could go first (even when we arrived and entered before them into the museum). There were also two moms with their little kids and we were all so annoyed, they couldn't even enjoy. When having large groups, the museum should contact people to let them know about the situation and to see if they agree, we would have happily reschedule if told in advance; because when we left the place, there was a very small group of people waiting outside, we imagine they had a better time. The museum is beautiful, the staff is nice and the ice cream they serve is delicious! But should manage situations like the one we detailed better.