There are 3 different sized building blocks to exercise children's judgment of large medium and small things. Baby can use his or her own imagination to build different building blocks thus improving baby's hand-eye coordination. Manufacturered by settlede. The building blocks feature the high-quality materials which are non-toxic and harmless and not easy to break thus ensuring the durability and safety of toys. The building blocks can be given to children as a gift I believe children will love this interesting gift. There are 12 right-angle building blocks of different colors to enhance children's awareness of color and cultivate children's color matching ability.