A tray puzzle has a hard, durable board that acts as a place to store the puzzle, as well as a guideline for assembly. When the thick puzzle pieces are removed from the tray, a finished image can be seen printed on the tray. This helps people to see where the puzzle pieces should be placed. A tray puzzle's pieces fit securely within the frame making it a great travel activity. The puzzle can also be assembled without the puzzle board tray for more of a challenge. Seniors and kids alike both enjoy this fun puzzling activity! *Please note, our tray puzzles have been produced in the USA over the years, however due to the volume and difficulty in producing these puzzles, our US puzzle manufacturer is no longer able to produce these puzzles for Cobble Hill. Therefore, the production of Tray Puzzles has been moved to China.