In book 4b, Peter and Jane meet the animals at a farm in 41 new words including, ‘work’, ‘thanks’, ‘stop’ and ‘horses’. Once this book has been completed, the child moves on to book 4c. The Key Words with Peter and Jane books work because each of the key words is introduced gradually and repeated frequently. This builds confidence in children when they recognize these key words on sight (also known as the ‘look and say’ method of learning). Examples of key words are: the, one, two, he.