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 labelled photographs to explain the scientific principles behind their use.Levers What is a lever? Read this book to find out a and learn all about levers. Leracy cosuta Each book in the How Toys Work series focuses on a type of simple machine and explores how it is used to make different toys work.This book looksanbsp;...
|Publisher||:||Raintree - 2013-04-01|