Considering framing can be an expensive proposition, I thought this was a very cool idea for hanging matted, unframed prints. Simple hardware hooks and binder clips here, but:
These binder clips come in all kinds of styles and colors. And they are inexpensive.
Even Magnetized, to Jazz up and add some panache to the refrigerator art, maybe:
Anyway, here's a link to "Wintertime Crafts" --great name-- that sells some of these clips, and other fun stuff.