Unique shark-shaped dominoes make math fact practice fun! Made of heavy cardboard, each domino has a math problem on one end and the solution on the other end. As players solve the problems, the pieces fit together and a zigzagging path of cool critters emerges! Comes with a answer wheel for easy self-checks! Each set includes 36 dominoes. Dominoes measure approximately 3'. For 1-4 players. Grades 2+.