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2) Levers
Author
Series
Description
Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines levers and uses simple language and labeled photographs to explain the scientific principles behind their use.
3) Pulleys
Author
Series
Description
Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines pulleys and uses simple language and labeled photographs to explain the scientific principles behind their use.
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