A book about Machines'
Someday people from Earth may live on Mars. In this century, we will go to the planet to learn more about it. It will become our outpost in space - our space colony.'
Hard things, soft things, stretchy thigs. two bees discover all kinds of materials when they join in the preparations for birthday party.'
In this book you can learn about machine mechanism in our daily activities.'
Explains how different aspects of daily life have changed over the centuries for cooking a meal '
The author takes a hard look at the traditional idea that discipline equals punishment. She also offers an approach taht calls 'nondiscipline disciplne' and an array of alternatives to punishment that she calls the 'magic list'.'
This book show about how planes stay up in the air, how helicopters fly, and also looks at wind power and space flight. The second section explains how cars work, with details about the engine, gearbox and brakes, and describes many types of motorbikes a
Inside homes and houses from long ago, and compare them to people's homes today'