Mr. and Mrs. Clatter have 5 children, half of which are boys. The document also contains riddles about how this is possible, what is something that is heavy forward but not backward, and what did you eat if you threw away the outside and cooked the inside of something and then ate the outside and threw away the inside. The document also contains brief explanations of solids, liquids, gases, matter, elements, chemical reactions, substances, using the periodic table, and gas expansion and contraction.