Originally introduced in 1880, "Fifteen Puzzle™" quickly became the world's best known puzzle! A confounding concoction that challenges you to slide the 15 numbers into order inside the tray! We've recreated this smooth, polished stainless steel collectible just as it appeared in the height of its popularity in the 1930s! And we enclose a booklet with over 30 more teasers, plus a leatherette carrying bag for travelling fun! Ages 8 and up. 5.25" square.