MIGHT USE THIS IDEA - Very Hungry Caterpillar Mobile. Hang lanterns red, 6 in two shades of green) with different lengths of fishing line. Use pipe cleaners for antennae, and construction paper for eyes and nose. Very cool in a children's library space.
I would add student writing on an index card with perhaps why they chose that cover to make it more student centered. Love the idea. * could also change it to say "but here's my writing" and display student writing samples