For the first time at about the 5th week: the organs of the organism mature rapidly and all the senses begin to work. For example, he begins to shed tears when he cries or to show his happiness by smiling, he also observes and listens from time to time to everything that happens around him, and reacts visibly to smells and movements. The second time is around the 8th week: the infant realizes that his surroundings turn out not to be uniform and fixed, but to consist of moving concrete things. This dazzling change frightens him. However, frequent lying in the mother’s arms and close contact with her can to a considerable extent eliminate the emergence of fear. The third time at about the twelfth week: the infant discovers movement and also recognizes the process of certain activities. As a result, his movements, which used to be rigid, become flexible and he learns that he can control his own behavior. This also confirms his “skills”, as he squeals, giggles, learns words excitedly, and constantly tries to “talk” to his mother or other people. Fourth at 19th week: The infant can grasp things, turn or flip things that are accessible, and watch the course of an object. At this point he is studying everything – touching it with his hands or simply putting it in his mouth. Fifth at week 26: The infant gradually understands cause and effect relationships between things, such as pressing a button to hear beautiful music. At the same time, he has learned that: something can be placed inside another thing or outside a third; things can be near or far away. Therefore, the games that interest him most are taking things out and moving them in and making a mess of everything. Sixth at week 37: The infant can categorize things in an abstract way; for example, he understands that a dog always barks “woof woof woof” and that there are no exceptions for big dogs and small dogs, black dogs and white dogs. This shows that he is beginning to think logically like an adult. Seventh at 46th week: The infant realizes that there is a sequence for doing everything, so his favorite game is “do it yourself,” which is to complete a task in order of priority. It is through this game that he learns to “do things” and deepens his impression of order. However, he thought that the order was fixed. Eighth at 55th week: The infant finally realizes that the sequence can be changed at will by his own decision. At this point, he is able to “make plans” according to his own wishes and to express what he wants.