Learn about materials by meeting some hilarious characters who are keen to explain why they are the most important!This book makes science learning fun and engaging for children aged 7 plus.Meet Wood, who has been used throughout history to build things so must be the MOST important material.But, Paper, Concrete, Plastic and many other characters are sure they are much more useful.So which material really matters most? What Matters Most is a series of humorous books for children that explain science processes with lively comic artwork and show why variety is important.Titles in the series: Body Bits / Energy and Power / Gravity and other Forces / Materials / Plant Parts / The Sun, the Moon and the Planets