This famous (or infamous) 14-piece puzzle is so old it's described in manuscripts attributed to the Greek mathematician Archimedes. With these Tangram-like pieces, it's possible to form up to 536 different squares, yet making just one is incredibly difficult. This handsome version is acrylic and wood, 7" square. Leave it out for family, friends, and visitors to try. You can also make many other interesting shapes from the pieces. Solutions are included. Made in USA.