Gradually he pieced together a "blueprint" for normal cognitive development in children ... the toy still existed. Piaget found four major developmental stages (with many subdivisions).

By thinking that children have great cognitive abilities, Piaget came up with four different cognitive development stages, which he put out into testing. Within those four stages he managed to group ...

Image caption, According to Piaget, children enter the preoperational stage ... to our activities collection to learn how you can support your child's language (and cognitive) development every ...

Jean Piaget's ideas about child development continue to influence pedagogical practices around the world. His pioneering work revolutionized our understanding of how children learn and think.