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This is called the sensorimotor stage. During this period the child develops cognitive abilities. They learn through their senses. The more the child is exposed to the more they will understand. https://speechblubs.com/blog/child-brain-development-stages/#:~:text=these%20two%20stages.-,Sensorimotor%20Stage,more%20he%2Fshe%20will%20understand.
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The first trimester is the development of the fetus. During this time period the organs and body systems are developing.
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Migration occurs 9 weeks after conception. By moving along glial fibers, neurons "migrate" to where they belong. -
During the second trimester the fetus gains the ability to move. Common events are moving side to side and the occurrence of kicking. The fetus will be 13-16 inches longer and weigh 2-3 pounds heavier. https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-second-trimester#:~:text=Fetal%20development%20during%20the%20second,fetus%20can%20hear%20your%20voice. -
The brain is still developing as well as the some vital organs like the lungs. https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-third-trimester#:~:text=The%20Third%20Trimester%3A%20Fetal%20Development,average%2C%206%20to%209%20pounds. -
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1 month post birth, the baby gains the ability to respond to external forces with subconscious reflex acts. When a babies mouth or head is touched it will turn in that direction and begin to suck. https://www.simplypsychology.org/sensorimotor.html -
The baby will repeat pleasurable actions centered on its own body. Infants begin to create sensations and two types of schema (habit and circular reactions). “Circular” is the repeated nature of an action that a baby finds pleasurable or interesting.
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This is the realization that objects exist even after they leave our sight. An example of this being present with babies is when you play peek a boo with them. https://www.simplypsychology.org/sensorimotor.html -
Unlike Primary Circular Reactions, secondary circular reactions involve the repetition of actions that involve external objects. Like when a baby shakes a rattle and finds the noise interesting.
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Symbolic Thought signifies a child’s ability to form mental representations of objects or events that aren’t currently present. This can be associated with imagination. -
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This video below provides a general summary for what a child at age 2 should be able to cognitively accomplish. https://www.youtube.com/watch?v=6-XWwwXZprc&ab_channel=Howcast