Why are igloos igloo-shaped? They need to keep people warm and protect them from the icy winds. The clever design of an igloo means it can do all this. Discover more about igloo building, the Arctic, and how people adapt their houses to match their environment all over the world.This book is from Readerful's Independent Library. It is for children aged 6 to 7 to read without support. Readerful is a reading library specially designed to motivate children to read more. The series offers contemporary, inclusive books for children from 4 to 11 years, including: Books for Sharing: picture books to be read aloud by an adult for inspiring reading sessionsIndependent Library: fiction, graphic texts, character mini-series and non-fiction for children to read independentlyRise: fully decodable books for older struggling readers to read independently.How Readerful works: - Read aloud the Books for Sharing for magical reading sessions that motivate children to read more. - Then encourage children to choose a book to read by themselves, from Readerful's Independent Library or from Rise. You'll find links between the books' topics, vocabulary, characters and authors - all designed to keep children reading, boost their vocabulary and develop their knowledge of the world around them.