Blocks is really a wonderful way for children to have fun while developing physical cognitive and problem-solving skills. It can exercise baby's hands eyes brain coordination and cognitive ability. Manufacturered by Jinguio. 52pcs blocks in one set with bright color. Develop thinking and problem solving ability imagination and creativity cognitive and manipulative ability for your children. The blocks polished very smooth with environmental friendly and non-toxic materials which is safe and will not scratch the hands of children.