Where does podrostikus live?

Eight-year-old Leonia was assigned to keep a diary of observations about an animal at school. Everyone in the class has someone: parrots, rabbits, sand rats. And only Leonia, unfortunately, has no cat, no dog, or even a hamster. However, Leonia has an older brother named Leonard. The teenager Leonard — a representative of the species homo sapiens — is also an animal, just like all of us. Why not observe him? Leonard's behavior, diet, habitat, and migrations all become the subject of his sister's research.