Volcanoes make a big bang – with fire, lava, and ash rain. What does a volcano spit out? Why aren't all mountains volcanoes? What do they have to do with tsunamis and earthquakes? With flaps, children can look over the crater rim, move the tectonic plates, and make the fire mountains erupt. They embark on a journey from the Eifel to outer space. Along the way, they dive to underwater volcanoes in the deep sea, marvel at Iceland's geysers, and climb the Sabancaya in Peru. Page by page, they discover a wealth of factual knowledge about volcanoes, their formation, and research.

Why? What for? How? The non-fiction book series for children aged 4–7. Every day, children discover something new – leading to many questions. Why did the dinosaurs go extinct? Where is the sun at night? What do we need blood for? The popular non-fiction series Why? What for? How? provides children with answers at their level. It examines a wide range of topics from the everyday and interest worlds of children in an age-appropriate manner, with great attention to detail.

Detailed images, understandable factual texts, and surprising flaps that illustrate movements or processes and allow a glimpse behind the scenes enable children to explore their topics independently. The joy of hands-on discovery, the loving execution, and the high-quality design ensure lasting enjoyment of each individual book.