Gorilla Blocks Extra Large Building Blocks 66 Pieces These extra large building blocks promote creativity logic and reasoning skills as well as developing motor skills and hand/eye coordination. Blocks interlock securely and encourage children to work and communicate together. Gorilla Blocks foam evolved from automotive safety applications and is extremely durable non-toxic weatherproof and recyclable. Set includes 66 pieces in assorted sizes and colors. The entire set weighs only 8 lbs. but each individual block can hold up to 220 lbs. of weight. Helps teach fine motor skills and hand-eye coordination 66 durable building blocks Assorted sizes and colors Each block holds up to 220 lb. of weight Entire set weights 8 lbs. - Color: Multi - Finish: Assorted - Grade: Grade PK-6 - Material: Foam - Dimensions (in.): 3-1/2 x 3-1/2 to 3-1/2 x 10-3/4 - Age: 4-7 years - Package Contains: 66 Pieces