●Attractive color illustrations and easy-to-follow text combine to present factual information that younger boys and girls will readily absorb and understand. What Are Things Made Of? Is one in a series of four entertaining What Do You Know About? ● Books, for very young children. It describes how familiar objects are made from minerals like iron or fashioned from wood or plastic or glass. Four pages presenting activities for children appear at the back of the book, followed by a two-page section for parents, with tips on explaining the subject in more detail.