The first day of preschool

Today is my 3 yr. old's first day of preschool. I'm really happy to get her into an environment where she can socialize with other children her age. Right now all her friends are actually her sister's friends, and consequently 2-4 yrs. older than her. She is great with one-on-one playing, but not with group play. She likes to be the center of attention too much. I am hoping that preschool will give her a chance to learn how to interact in a group and play more age appropriate games. Plus I'm looking forward to two hours to myself! Yeah preschool!