This book is suitable for ages 7 to 8 years. Read all about wheels and axles and their many uses in this book. Children will be thrilled to learn of their many uses, from doorknobs to the insides of a clock. There are wheels that move, turn, steer, and serve as gears. Это и многое другое вы найдете в книге Get to Know Wheels and Axles (Get to Know Simple Machines) (Paul Challen)
Get to Know Wheels and Axles (Get to Know Simple Machines) Paul Challen
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