My daughter is turning 4 and having a frozen party (who isn't?! 
) and I want people to know they are welcome to dress up, but as Frozen only has a few characters I know some wont want to...
Also, there's been a few parties (and a thread on here!) where only the birthday child can be Elsa... But I'm happy for them all to be Elsa...
How can I word that on my invites?