For over 50 years, the Diamond Pyraminx Brainteaser Toy has boggled the minds of 3D puzzle enthusiasts. To play this difficult eight-sided twisty design, scramble the puzzle and then twist it back so that each side matches in color. Ages 8+. Made of plastic, the Diamond Pyraminx Brainteaser Toy measures 5.75h x 4.15w x 3.55"d.