We just hosted a 3rd birthday party at our local community clubhouse. I didn't want to have it at home because I wanted to enjoy talking to my adult guests (the parents of the other 3-year-olds) instead of making sure the 3-year-olds weren't breaking our pianos, china cabinet, TV, etc. We estimate that for 40 guests, invitations, clubhouse rental, pizza, softdrinks, ice cream, cupcakes, balloons, party favors etc. the party cost about $200. But it was exhausting to carry all those things to the clubhouse and clean up afterwards. The next party, I think we'll have at the roller rink so we don't have to do so much work.