Children are like sponges; they start to smell after a little while.
Kids enjoy laughing and are seldom bored when they find something funny. They also ask questions, often to adults, because they understand that the more words they can comprehend about a funny story or a joke, the more they'll enjoy it.
I like all things grammatical, and I had already written several books about parts of speech, and even the alphabet, so everything that makes up a sentence and even a word was covered except for punctuation.