What would you like to buy is one of the best books for children, as it helps them learn the words to express what they want. It also makes you feel comfortable, because you can ask them to buy something for you, or you can let them buy something for themselves. Whether it's a drink, a snack or a meal at a restaurant, they will feel like they have done something great. You might think it's a small thing, but for them, it could mean the whole world at that age. When they leave they will feel pride, and they may even start bragging and telling their friends what they have done.