Peter and Penny have been invited to their grandmaâs 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 workâ from the creator of
âBrain Surgery for Beginnersâ, â531/2 Things That Changed the Worldâ and âAnswers to Questions You Always Wanted to Askâ.
Peter and Penny have been invited to their grandmaâs 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 workâ from the creator of
âBrain Surgery for Beginnersâ, â531/2 Things That Changed the Worldâ and âAnswers to Questions You Always Wanted to Askâ.