Fun and durable large & medium cardboard building blocks set include 40 blocks in 2 different preferred larger sizes and 3 different colours. Holds up to 150 lb. Strong and safe construction, lightweight,  rounded edges, bright primary colours featuring brick pattern. Lead free design. Easy to assemble. Large- 12"W x 3"D x 6"H, Medium-6"W x 3"D x 6"H. 40 per package.