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How things work. - Alexandria, Va. : Time-Life Books, c1989. - 87 p. : col. ill. ; 31 cm. - A Child's first library of learning .

Ill. on lining papers.

Questions and answers provide information about how cameras, elevators, car engines, tops, yo-yos, and other devices work. Includes charts, diagrams, and an activities section.

0809448734 0809448742 (lib. bdg.)

89004535 /AC

Technology--Juvenile literature.
Questions and answers.

T48 / .H74 1989