TY - BOOK ED - Time-Life Books. TI - How things work AV - T48 .H74 2002 PY - 2002/// CY - China PB - Time-Life Asia KW - Technology KW - Juvenile literature KW - Questions and answers KW - Miscellanea N1 - Ill. on lining papers N2 - 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 ER -