Peter and Penny have been invited to their grandma's train museum but when they arrive they find some of the trains do not work! Their grandma invites them to help repair the trains, and along the way they discover the science of the machine and what makes it work. This book is written in comic book format and pictures show how machines work.

Train 2007, Raintree, Oxford

ISBN-13: 9781406205541

Paperback

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Train 2006, Raintree, Chicago, IL

ISBN-13: 9781410925572

Hardcover

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