When DD was 3-4, she'd regularly come to me with questions, and I'd sit her in my lap at the computer, pull up some visuals, and explain what I knew. She'd keep coming back with the same question until she was pretty sure she'd exhausted everything I knew about the subject. One of those subjects was, "What happens to food when you eat it?"

DD had just turned 4, and she had a pediatric appointment at which she'd already impressed with her abilities, but it was on the way out the door in which the doc was left speechless. DD stopped to regard a particular poster, and said, "Look, Mom! Small intestine, large intestine, pppppbbbbblllttt!"