Amazon.com description: Product Description: Why is ice slippy? What are gears? How do trainers help you to run faster? How do you keep your balance? What is wind power? All these questions and many more are answered in "On the Move", which explores the different aspects of forces and movement. "Science Starters" introduces younger readers to science in a structured but lively way. Each book explores an aspect of science. Activities and experiments, designed to make learning fun, complement the scientific points outlined in the simple introductory text.