Our foam dominoes give students a fun way to practice and reinforce key math concepts. The game includes two sets of 24 color-coded dominoes (48 total pieces); each set is ideal for up to four players. Instructions included. Made of durable foam (3" x 1.5"). Make finding area and perimeter a game! One set provides practice in calculating the area of squares and rectangles. The second set challenges players to calculate the perimeter of a variety of shapes.