This activity (on pages 19-25) is about fleas and ticks, which are common pet parasites. Learners first examine preserved tick and flea specimens under a magnifying lens and compare them for similarities and differences. They next examine a live pet -- brought in and supervised by an Adult Volunteer -- using a flea comb to search for fleas. Finally, learners create a drawing or comic strip showing how an animal becomes the host of a family of fleas or ticks, based on lists of given facts. The introductory "What We Know" section offers suggestions on preventing pets from getting parasites.