For the first 5 years of a child's life the mother teaches them. They learn their colors, their numbers, what foods to eat, how to ask for things, and other simple, valuable tools.
My friend is trying to teach her children to eat good foods- fruits, vegetables, unprocessed things, etc. When they start to whine at the dinner table, she tells them, "You can eat your food, or you can go to bed."
Along with good eating habits, she's also been working on opposites. This was their conversation:
Ashley: "What is the opposite of stop?"
Logan: "Go!"
Ashley: "Yay! Yes! What is the opposite of up?"
Logan: "Down!"
Ashley: "Good! What is the opposite of eating?"
Logan: "Go to bed!"