Say what?

Joshua decided to take Naomi to store with him the other night. He had a craving for Eggnog and needed a couple other things. So when they got to the store Naomi did not stop talking and asking all sorts of questions. When he picked up the Eggnog she took one look at it and said "What is that?" Josh told her Eggnog. So she thought about and says back(remember she is not quite three) "I know what egg is, but what is the nog?" They keep us laughing.