Our large foam dominoes give students a fun way to practice and reinforce key math concepts. Each game includes two sets of 24 color-coded dominoes (48 total pieces); each set is ideal for up to four players. Instructions included. Oversized dominoes are made of durable foam (4" x 2" ). 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. Grades 3-4.