Looking for some creativity... Daughters turning 7. B-Day is during the summer. How do you invite the class.?

My daughter is turning 7 and her birthday is in Aug. I would like something creative to give her friends to get contact information to send them invites closer to the birthday date. If I were to pass them out now with over 2 months til party they are able to forget. she is into Princess Ariel. Please help a mom out that is trying to invite school friends.
Looking for some creativity... Daughters turning 7. B-Day is during the summer. How do you invite the class.?
well call your daughter's teacher and ask for the contact information.