A.
Hello D.,
My niece had her 3rd birthday party at Core Creek Park in Langhorne. The guest list was about 75 people and there was plenty of room and things to do for everyone. The kids can go to the playground and you can take walks in the trails and find bugs. It was a lot of fun and I think they have about 10 different pavillions to choose from. The characters are a good idea, but just and FYI, I found from experience that children under 4 tend to get a little scared when they come to life on them.
Good Luck, A.