Puzzle storage!! Best way to store kids puzzles! Buy some Legal size poly expandable envelopes. Remove the string and replace with Velcro circles. Place in a bin or on a shelf. My rule is one out at a time. The envelopes are easy enough for my two year old to open and clean up himself.
Use paper organizers for puzzles; from The Navy Stripe: Organizing Kids Toys
Puzzle organization for under a dollar, neat playroom, easy clean up!
Use dollar store containers to keep kids puzzles organized. Tape picture to lid and a smaller picture on side. Easy to stack and see which puzzle they want.