My daughter's third birthday is in two weeks and I have decided that we will spend the day at the zoo where we have a season pass, invite anyone in the family and a few friends if they would like to join us, they are welcome. Then after zoo fun we will go home for pizza and cake. This is the least stress on me and something my daughter will love.  This way people are not pressured into coming also, and anyone who wants to may come back for cake also. The maximum of people who would be there including children is 15.