Master Pieces combines the highest quality in jigsaw puzzle production with the finest of artwork to produce true masterpieces. Each puzzle is constructed of thick puzzle board made of recycled materials. The puzzle pieces are random shaped and fully interlocking. As a finishing touch, the puzzles are aqueous coated to provide a protective, high gloss finish.We will always remember September 11, 2001. Complete this tribute in light and always remember this tragic day in American History. Tribute in Light glows in the dark.Ages 10 and UpBy Master Pieces