Analogy and Perspective

Aidan turned 3 yesterday and I have noticed two forms of astract thinking developing. One is for analogy. One example was heard today while he was eating blueberries. He said that the blueberries with visble. long stems were like lollipops. Note that he DID NOT LIKE the stems. The second was with perspective drawings. While formerly he would ask me why the train tracks just stopped, I noticed recently that he is saying the are very far away.