I just did this with my 4 yr. old for a sleep over "party" with her cousin. At the craft store we got cardboard frames. Our craft box at home is filled with all kinds of things. So they chose things from thereto glue on the frame. Buttons, stickers, pom-poms, fabric etc. We took a polaroid of the girls together in their PJ"s to put inside. Came out so cute!