You can purchase this book as part of the pack:The Pebble in my Pocket
Where do pebbles come from? How were they made? This book tells the story of a pebble, from its origins in a fiery volcano 480 million years ago to a busy, modern landscape. Readers follow the processes of rock formation and erosion that create new pebbles all over the world.
This book can only be purchased in a pack.