Cars, trucks, garbage trucks, and many other vehicles drive on the road every day. Which vehicles are quick to respond in an accident? What vehicles can be found at a construction site? And where does a truck driver sleep? Age-appropriate questions and answers, authentic sounds, plenty of interactive activities, and music make the series 'Wieso? Weshalb? Warum? junior' an auditory experience for the little ones. The book of the same name by Ursula Weller and Andrea Erne has been published by Ravensburger Buchverlag.