We use aprons for cooking, art, and most importantly pretend play. My five-year-old has been asking for a "restaurant apron" for awhile now and unfortunately they do not commonly make waist aprons for kids. With a pillowcase we made one...in about five minutes!
Find an old pillowcase that you are willing to cut holes through for the sake of some major imaginative play. I got mine for just $1 at the local thrift store.
We wrapped a ribbon around Emma's waist twice, and then snipped the ribbon. Then I wrapped a small piece of masking tape on one end to be our "sewing" needle.
At the closed end of the pillowcase, I made small slits about an inch or so apart all the way across.