This is mainly used as educational games. Cuisenaire makes these little plastic colored rods. Each color is a different length but all of the same color is the same length. Used to teach spacial mathematics, Roddles the game is basically a set of cardboard tiles with different puzzles to be solved using the rods. Mainly designed as a single player situation there are 1 or 2 cards specifically designed for head to head challenges. FROM THE BOOKLET INCLUDED IN THE GAME: "Develop problem-solving and spatial-reasoning skills with these challenging games and puzzles! Challenge players to find patterns in puzzles, to understand shape and position in measurement games, and to solve riddles that create paths in maze-like puzzles! Cuisenaire Roddles use Cuisenaire Rods in math and logic games and puzzles that are motivating and fun for both high school and elementary students. The 16 board games and puzzles emphasize spatial reasoning skills and come with a set of 74 rods and a booklet with pre-game activities and post-game questions for general discussion. Grades 3 and up." Contents of box: Rods, draw string bags to hold rods, 10 playing cards, and instruction booklet.