Germ Theory for Babies is a colorful and simple introduction for young children ages 0 to 3 to the world of germs, how they spread, and how we can stay healthy. 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. (This book may contain a sharpie mark on the top or bottom edge and may show mild signs of shelfwear.)