Uses humor in both text and illustrations to describe what it would be like to live without bacteria and describes how many are harmless or even helpful to humans and other animals.
Uses humor in both text and illustrations to describe how antibiotics were developed and what methods were used to fight infections and disease before antibiotics were available.
Uses humor in both text and illustrations to describe what it would be like to live without clean water and describes how people access water and the importance of making sure that water is not polluted or wasted.
Uses humor in both text and illustrations to describe what it would be like to live without the toilet and describes how people managed to dispose of their waste in the past.