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"I Want to Know! How does it happen?" is a continuation of the favourite series from #bookmaster - "I want to know!". This book is an informative and entertaining publication for children with more than 200 questions and answers about how the world around us works . The unusual format with a spring ensures convenient use during family quizzes and other games . The publisher has previously published three books in this series: "I want to know! About Everything in the World by Isabelle Fouger, I Want to Know! True or False?" and "I Want to Know! What will the future be like?" by Valentina Verte.