More to explore:
Nurses apron - dress up clothes
Children's Apron, Child's Apron, Apron, Girl's Apron, Bird Apron. $18.95, via Etsy.
DIY- Nurse Apron
a play house under the stairs
Red Ruffle Apron
For The Girls.
Love, love, love this shirt for one (or both) of the girls. Tutorial here.