I have something to share with you. 

My daughter has always loved dressing up in costumes.   It doesn’t matter if it’s a princess,  a superhero or a pirate, she loves costumes.  Plus we often dress in costume for birthday parties.
So how do I stock up without spending a small fortune at the Disney store?   I wait till Halloween and the day the sales hit, I run to Target and Party City and I get a bunch of stuff in her size.  Last year we got lucky –  I bought two superhero costumes and in kindergarten, we had a superhero day at school.  We had two outfits to choose from and everyone went to school happy.