I never know what to do with puzzle pieces. You can’t just throw the puzzle in the toy box because all of the pieces will get lost, and all of the pieces get all mixed up, it drives me crazy. So today I made pockets on the backs of my puzzles, easy and best of all the puzzle pieces stay right in the back and not scattered in toy box. And my son loves putting them in and taking them out. They are easy to make, cut a fleece square (or whatever fabric you want) the size you want, cut out a flap, sew on velcro, and hot glue it in place on your puzzle back. Just make sure you make the opening narrower than the bottom of the pocket, so that it leaves some room for stuffing in the pieces.