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" ). The problems in these sets focus on the 5th and 6th grade level standards for algebraic expressions and equations. Ideal for any students needing additional practice. Grades 5-7.