The flipping, sliding brainteaser challenge. This exciting brainteaser is one of the most unique single-player challenges yet. The object is easy: line up the number tiles from zero to nine. Slide the rows to move the tiles then flip the cylinder to reverse the top and bottom numbers. The catch is, six of the ten numbers reverse at one time. This flipping, sliding, take-anywhere teaser is not only tough to solve, but it's tough to put down as well! Slide it, flip it, solve it. It features built-in number tiles and rotating cylinder with ergonomic, easy to grip handles, and a convenient travel and storage box. Ages 8 and up.