Each title in the 12-book Think About... series opens with a helpful letter to parents explaining ways to use the material in the books with their kids. Does a Hippo Go to the Doctor? explores and explains why animals in the wild don"t go to doctors, that some animals can be cared for by vets--but only people use professional medical services throughout their lifetime. A funny, kid-like question ("Does a hippo go to the doctor?") is shown with a silly scenario (a hippo on an exam table), and thoughts and facts about why that animal"s behavior and lifestyle aren"t compatible with medical services. Animals that might use some medical care are then featured, which leads into an exploration of how humans take care of their health and bodies. A final spread offers activities that further extend a child"s grasp of the featured topic.