We had our first Montessori birthday on Saturday for a friend who was turning 5.
A couple of things that are a little different from "normal" school is that there are mixed ages in classrooms and there are 25-27 kids in each class (compared to 16-18 in other early childhood classes in DC). In Robbie's class the ages range from 3-6.
The friend decided he wanted to invite the entire class and pretty close to the entire class showed up. The kids had lots of great food and great activities primarily focused around "Cops and Robbers."
A good time was had by all.