Grateful acknowledgement is made to the following sources:
Photographs and images
Making a zigzag book: Stories into Books – D Dyer and A & V Kenyon (UCT 1990)
Molecules and Atoms Teacher Information: Primary Science, Developing Subject Knowledge, Jane Devereux
Every effort has been made to contact copyright holders. If any have been inadvertently overlooked the publishers will be pleased to make the necessary arrangements at the first opportunity.