D.H.
K.,
We had my daughter's 3rd birthday party at our house. It was a combined birthday party for her and one of her best friends. We had a small petting zoo come to our back yard. We made it an "Old MacDonald" theme. It was fabulous. I think we had about 35 kids total. The kids played on our backyard swing set, pet the animals, and played with our other outdoor toys.
Good luck!
D.