{ "item_title" : "How Roller Coasters Really Work", "item_author" : [" James Smith "], "item_description" : "Roller coasters are exciting to ride, but they're also full of fascinating science. How Roller Coasters Really Work introduces young readers to the forces, motion, and engineering ideas that make these rides possible. Written in a friendly, accessible style for beginning readers, this book explores hills, loops, turns, wheels, energy, and more-using simple explanations supported by engaging black-and-white illustrations.Readers follow a coaster from the first climb to the final brake, learning how energy changes, why riders feel different sensations, and how engineers design tracks to be both safe and thrilling. Each chapter focuses on a single idea and presents it in clear language suited to elementary readers who are curious about how things work.This book offers an introduction to STEM concepts such as gravity, potential energy, kinetic energy, acceleration, and engineering design. It is suitable for independent reading, classroom use, or shared reading with adults who want to explore science together.", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/9/79/827/776/9798277768648_b.jpg", "price_data" : { "retail_price" : "12.99", "online_price" : "12.99", "our_price" : "12.99", "club_price" : "12.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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