YOPCDJ 24pcs Mesh Zipper Pouch File Bags Puzzle Storage Bags, A3 17x12 Inches Large Reusable Zipper Pouches for Organizing Classroom Board Game Organization

Not for my classroom but for my own house: I got these mesh zipper pouches in A3 size and we keep the puzzle and its* pieces in the bag together. My 2 yr old is able to unzip them himself and put the pieces back in when he's finished.

I’m not sure if they would fit in here, but we put ours in these and you can see through the bag. https://a.co/d/0gzTFtzJ Non-commissionable link.