40 gigantic cardboard blocks;Holds up to 120 pounds, safe enough for most kids to stand on;Printed with different patterns on each side so you can design different looks;Includes 24 small, 8 medium and 8 large cardboard boxes;Recommended for children 3 years of age and older 40 gigantic cardboard blocks Holds up to 120 pounds, safe enough for most kids to stand on Printed with different patterns on each side so you can design different looks Includes 24 small, 8 medium and 8 large cardboard boxes Recommended for children 3 years of age and older