Our foam dominoes give students a fun way to practice and reinforce key math concepts. 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").The problems in this set focus on the 5th and 6th grade level standards for algebraic expressions and equations. Ideal for any students needing additional practice.