How to Save Your Granny from a Runaway Train

How to Save Your Granny from a Runaway Train

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Author: Swapna Haddow
ISBN: 9780008713355
Publisher: HarperCollins Publishers
Year first published: 10 Nov 2025
Pages: 64
Format: Paperback / softback

Bonkers dilemmas that can be solved with science and a bunch of brilliant physics experiments.

Book of the Week: The Week Junior*


**No grannies were harmed in the making of this book!**

Trick a shark! Lift a jumbo jet! Escape a deserted island! Stop a runaway train!

Explore a bunch of ridiculous (and not-so-ridiculous) dilemmas – with solutions from the astonishing world of physics.

Sounds unbelievable? Test the science for yourself, with easy-to-follow experiments throughout!

What are you waiting for? Let’s save Granny!

Written by bestselling and award-winning author Swapna Haddow, with brilliantly funny colour illustrations from award-winning illustrator Jess Bradley.

COMING SOON: How to Make Diamonds From Your Pencils (chemistry) and How to Stop a T. rex From Eating Your Socks (biology)

Experiments in How to Save Your Granny From a Runaway Train:

• Parachute egg drop • Lever • ‘Pulley’ system • Compass • Friction ramp • See sound • Locating sounds • ‘Megaphone’ • Telephone • Periscope • Bend light • Eggshell bridge • Shadow puppets • Electromagnet


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