When a teacher challenges her class to decide what is the most important animal of all, seven children champion an animal for the top spot. Is it elephants or beavers who create habitats where other creatures can live and thrive? Is it tigers or sharks who are top predators, or bats who keep insect numbers down? Or is it tiny krill, a food source for many sea creatures? And, lastly, how about the small but mighty bees, master pollinators? Join the children to find out how special these creatures are in this very first introduction to keystone species and ecosystems.