The Motor-Perceptual Stage is a baby college which requires much homework for the infant.
From these contacts they gain an a knowledge of texture; shape, size, weight, and a sense of space.
If ever there was a baby college, this is it. If you watch a baby crawling on the floor they are constantly probing with fingers and toes and mouth and anything else they can bring into contact with an object, which can be the rug, table legs or toys like blocks, balls, and dolls etc. Their activity may look like aimless fidgeting to an adult, but to the contrary, it is intense exploration of the world.