Let's explore the material world Why is a milk bottle made of plastic? Why is a sweater made of wool? What's the best material for a slippery slide? Take a closer look at the many materials around you, and discover what your world is made of in this interesting and informative series.
About the Author Robin Twiddy is the author of the Castles series, the Tail to Teeth series, and the What Living Things Eat series.
