I learned quite a bit about empathy, and to be honest, I realized quite suddenly and rapidly that I am not unique, or that is to say, there are another few billion people all that are similar in their thoughts and empathy. Suffering is everywhere. Sadness is everywhere. It was the first time that I realized truly, that my parents are real people, that they must feel guilt, pain, and sadness as well. It was hard to take in at first but to go on without that realization would be trapped in a child's world - everything revolves around me.
They also taught me about matter and energy, I realized how things work, what water is, and what science is. I realized that our perception of reality is so segmented and categorized, yet reality is infact continuous with no barriers or boundaries. A lake is not a lake, it is a hole in the earth filled with water. A tree is not a tree, it is a long line of large moss-like things, protruding from the earth, sustained by chemical events that hold energy taken from the sun.
I realized how large the universe is and how complex - yet how small I am.
I also learned a great deal about psychology, others and my own. I learned how to "read" people through their face and expressions. I "tapped" into their thoughts, so to speak, and I became extremely sensitive to changes in people's voices, pitches, tones. I became more aware of body language. I became aware of people's intentions, goals, processes.
I learned a lot from psychedelics.