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 machines and what makes them work.
WHY THINGS DON'T WORK is a series of books that present a comic story to show how machines work— from the creator of
‘Brain Surgery for Beginners’, ‘531/2 Things That Changed the World’ and ‘Answers to Questions You Always Wanted to Ask’.
