Sally Hewitt was a primary school teacher for ten years before she became a full time writer of non-fiction books for children between the ages of three and eleven. Sally has written many books on a wide range of topics and visits schools and libraries giving talks and workshops.

What are materials? What is a solid? What is a liquid? What is a gas? Water Mixtures and solutions Heat Melt and mould Squash and stretch Recycling materials Modern materials Glossary Index