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, over the years our Tray Puzzles have been produced in the USA. However, due to the high volume and difficulty of making these puzzles, our US manufacturer is no longer able to produce these for us. Therefore, puzzle production for Tray Puzzles has been moved to China in order to continue offering this great line of puzzles. Thank you for your understanding.