Zzzzzzzz! It's a mosquito. Such a tiny insect, but its beating wings make such a BIG sound in the silence. Sound is a sense we often take for granted. Where does sound come from? Why are some sounds loud and some soft? Some high-pitched and some low-pitched? How do humans and animals use sound to communicate? What's the difference between natural and artificial sound? This lyrical picture book explores all of these questions, giving young children a charming and gentle introduction to how sound works.