There's a lot of gross things one can think of that live under our feet—but what about on our feet? Fungus especially find a warm, dark home between our toes and can cause a lot of annoyance! In this colorful volume, readers investigate exactly what happens on and in their feet, even if they can't see it. Simple language, clear diagrams, and a group of friendly narrators draw readers into this part of the body to learn all you could want to know about the feet.