Puzzle Sorting Tray, Stackable

Wife needed it, I made it. Simple, stack-able trays designed @200mm square. Adjust size as needed. Could also be used for other things, I'm sure. Designed with small finger-grabs on two sides to help separation. You may have to sand the edges of the bottom for a better fit when stacking. Recommend gluing a piece of felt to the inside. Your wife will love you for it!