The older child begins comparing categories in the Perceptual-Conceptual Stage.
5. Perceptual-Conceptual: In a sense, the spiral of events begin to occur again but on a higher level.
The child notices, or is taught that a horse, a car, a train, a boat and a plane (all of which are categories or percepts) have something in common. This process of abstracting and comparing the bonds of categories is what the perceptual-conceptual stage
Please switch to the graphic version to see an illustration of an examination of a door jam where the THE WALL IS RIGID, and also the discovery that GRASS WILL BEND AND BREAK.