Half an Hour with the Lower Animals: Protozoa, Sponges, Corals, Shells, Insects, and Crustacea by Charles Frederick Golder is a fascinating book that introduces the world of the simplest animals to readers of all ages. The author describes in detail the life and characteristics of protozoa, sponges, corals, shells, insects and crustaceans, revealing amazing facts about these creatures. The book contains numerous illustrations that help to better understand the subject of the conversation, making reading even more interesting and informative. "Half an hour with the lower animals" is an excellent guide for those who are interested in nature and want to learn more about the diversity of the animal world around us.