Concrete operations refers to the third stage in Piaget’s theory of cognitive development applying to children between the ages of 7 and 11.
It is characterized by the ability to apply logical, systematic principles to specific experiences, but the inability to distinguish between assumptions or hypotheses and facts or reality, flexible, reversible thought concerning tangible objects and events. Moreover, in Piaget's theory, it is the 3rd major stage of cognitive development , in which children can decenter their perception, are less egocentric, and can think logically about concrete objects. (see Concrete-operational period , Concrete-operational stage ).