- 
  
  Youjung's DoB
 - 
  
  Rubbed the soft blanket.
(Shows coordinating sensation with motor activity) - 
  
  Searched for parent's face when playing peek-a-boo
(Shows development of object permanence.) - 
  
  Thought that the sun shined when it was happy.
(Displays animism, which is part of the preoperational stage.) - 
  
  Blocked the TV, thinking the people can see what I can see.
(Shows egocentrism, not being able to see in another person's point of view.) - 
  
  Can count how many ducks are in the pond)
(Shows concrete thinking by counting the ducks, instead of thinking the possible number of ducks.) - 
  
  Being gentle with someone else's belongings.
(Realizes that just because it isn't mine, I should still respect them. This shows less egocentric thinking and more mature thought processes.) - 
  
  Gave advice to a friend when they told me a hypothetical situation.
(Shows capability of dealing with hypothetical situations, which is part of the formal operational stage of development.) - 
  
  Broke apart an argument between two friends.
(Realized that I can control the outcome of the situation into something less negative.) - 
  
  Graduated high school.
(Being able to finish something until the end.) - 
  
  Got married.
(Being able to commit to a long term relationship.)