A pretentious title for a shallow book. Successive sections deal with disconnected facts of science -- matters as unrelated as sound vibrations -- relation of heat to expansion -- etc. etc. The intention is to introduce children to some of the elementary facts of the scientific world, but the experiments suggested are difficult for a child to follow on his own, and demand more accurate and exact explanation of cause and effect than the author has seemed to think it necessary to give. The result is that misconceptions will be inevitable -- and we feel that children should start with sound factual foundations, and not errors and unclear thinking.