piaget's preoperational thinking

Aditi was a nice girl to talk to. She was very active and did not want to sit in one place for a long time. In the end, she was getting really impatient and wanted to play on her own with her toys, so I gave her candies and let her go. She answered all my questions and could converse very well. However, Aditi could not conserve substance because she thought that taller means more, she could just look at it and say that it was more because visually it looked more...