Do you use tools? Sure you do, anytime you eat with a spoon or drink with a straw or write with a pen! A French chef flipping crepes with her spatula; Salvadoran fishers mending nets with their marlinespikes; an American girl carving a jack-o'-lantern with a knife -- in every country of the world, people of all ages use tools to make their lives easier.

The world is full of houses. Big houses and little houses. Houses that stay in one place and houses that move from place to place. Some houses are made of wood or stone; others are made from mud or straw. But all of them are made for families to live in.