Didax:   Jumbo Unifix Cubes are bigger and more fun!Little hands will love these easy-to-handle chunky connecting cubes. A great way for developing key number concepts including counting, one-to-one correspondence, cardinality and comparing. Just like traditional Unifix Cubes, these snap together easily and stay connected, yet can be pulled apart with minimal effort. Includes 20 cubes, 1 ½” on all sides, in four bright colors. Activity ideas included.