Learn about place value and practice addition and subtraction using number patterns on the grid. Perfect for helping children focus on important math concepts. Features a durable ocean-themed mat that measures 48 in x 56 in, 3 inflatable cubes, 64 frames and 64 markers, 4 t-shaped frames that highlight 10 more/less and 1 more/less, and an activity guide featuring CCSS-based activities. Ages 6+.