When my daughter was 3 years old, she became quite curious one day about what different things were made of. She ran around the room, excitedly pointing to things, trying to stump me with her questions:
“Daddy, what is the table made of?”
“Daddy, what is the spoon made of?”
“Daddy, what is this toy made of?”
As she looked around for a new object, I turned it around on her, with a question of my own.
“What are you made ...