Additionally, when babies are hungry, they do not just wait to be fed, their mouths and lips search for the food. .
Stage 2 - 1 to 4 Months: Primary Circular Reactions.
A circular reaction occurs when the baby has a new experience and tries to repeat it, like in thumb-sucking. As with thumb-sucking, most of the primary circular reactions involve the organization of two previously separate body schemes. This is what Piaget refers to as the "construction process". The baby actively puts together different movements.
Stage 3 - 4 to 10 Months: Secondary Circular Reactions.
The developments of the second stage are called primary circular reactions because they involve the coordination of parts of the baby's body. Secondary circular reactions occur when the baby discovers an event outside him/her self. An example of this is when a baby kicks a toy and it makes a noise or lights up. Piaget speculated that infants enjoy their own power and ability to make an event happen again and again.
Stage 4 - 10 to 12 Months: The Coordination of Secondary Schemes.
In this stage, the infant's actions become more differentiated by learning to coordinate two separate schemes to get a result. An example of this is when a baby moves something to acquire a blocked object. This is important for our understanding of how children develop basic experiences of space and time.
Stage 5 - 12 to 18 Months: Tertiary Circular Reactions.
At stage 5, infants experiment with different actions to observe different outcomes. An example of this is when a child puts his/her hand over a bathtub faucet and the water sprays. The child then shifts the position of his/her hand, and observes how the water sprays out at different angles. Here the child is learning entirely on his/her own, without any teaching, and are developing their schemes out of curiosity about the world. .
Stage 6 - 18 Months to 2 Years: The Beginnings of Thought.