It depends on whether the party is for you or for her. In my opinion, kids only enjoy what they are able to enjoy - and usually big crowds are hard on them when they are that small. I think when a child is one, have one friend, then when they are two, two friends, and so on until they are nine, when you start going back down and have eight friends, then ten has seven friends, until they are 16 and go on a date. Parties are really fun, and I gave every kid (I had 6) a party almost every year and we played games and had their favorite food - just what they wanted. Other times, we had Halloween parties or Graduation parties or Christmas parties or sleepovers - and invited plenty of friends and had lots of fun. But the child having the party directed the food and games and friends for their birthdays so that they didn't get lost in it.