Two of my favorite ways to organize kids’ artwork come from the hardware store.  Clothespins are perfect for hanging things from Metro Shelves.  If you don’t have shelves you can stretch heavy twine between eye hooks and hang from there.  Painter’s tape makes easily removable frames for rotating pictures.  Both of these methods work well with bulky collage pieces.  If you still love a piece after it has spent time on the walls it can be moved to a large folder such as this by Alex Toys.  There is nothing like time staring at a piece on the wall to help with the editing!