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Tunnels are round and other questions about building
Colourful, surprising and full of information, the I Wonder Why books have set thousands of young minds buzzing. I Wonder Why Tunnels Are Round is the perfect introduction to building, featuring bulldozers, diggers, skyscrapers and much more.
What do you want to find out? Clear, lively text answers all those tricky questions about how the world works, while friendly, funny cartoons add interest.
With over more 35 titles across a mind-expanding range of subjects, this is a series guaranteed to amaze and amuse.
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