Walking through a city, you'll see lots of buildings and statues - but to discover the hidden world below the streets, you'll need your 'magic' torch and your sense of adventure!Explore the cellar beneath the house, the pipes below the pavements, and the car parks and underground trains that run under our feet.Maybe you'll even uncover the fascinating remains of an ancient city, if you're lucky. This title is part of the My First Discovery paperback series - a unique collection of beautifully illustrated information books for children aged 4 to 7, with simple language to aid learning and realistic artwork to inspire young minds.This edition contains a paper torch at the back of the book, revealing hidden secrets on the 4 darkened transparent pages and making the story come alive - one detail at a time.With free access to a brand new audio app, children can listen and read along at their own pace, page by page.