After two coats of spray paint, I glued a strip of velcro along the top of one side of the box and small pieces of velcro to the backs of wooden animal beads (again, we already had these.) I glued a clothes pin to either end, then labeled the shapes and doors with permanent marker. I gathered various flashcards and paint chips to clip on the sides.
I could hardly finish it because my little sweetie kept pushing me aside to play with her new toy!
It's been over a month and she still loves it!