The club has been invited to watch the launch of a new rocket! But first Lucas and Sofia are going to explain the building process of this incredible machine to their friends, step by step. Share the excitement as the Junior Engineers Club gets a firsthand look at how a rocket is built. ABOUT THE SERIES: This brand-new STEM (science, technology, engineering, and mathematics) series will take readers on visits to various work sites so they can see exactly How It's Built! Kids will follow along as a small group of fictional characters get to find out exactly what it takes to build things that they probably see all the time, like bridges, houses, boats, and cars, to things that they might dream of being inside, like skyscrapers and rockets.