Smarcks Smart Blocks The Smarcks Starter Set comes in a large 15 x 13 x 7 polypropylene container 70 childrens blocks which come in five different sizes Each of these sizes have different educational shapes and numbers on the posts and come in all seven colors. Smarcks are full size childrens blocks that can be assembled with full size Mega Bloks and Lego Duplo blocks Smarcks can only recognize other Smarcks blocks