The bestselling scientific series continues to expand! With scientific information from an expert, this is the perfect book for enlightening the next generation of geniuses. A timely and simple explanation of the science behind germs, from the #1 science author for kidsGerm Theory for Babies is an engaging, basic introduction for youngsters (and grownups!) to the complex questions of what germs are and how they spread. Full of scientific information and written by experts,