Friedrich Nietzsche knew that a child is hidden in each of us- a child who wants to play. Childlike pleasure in playing rarely manifests itself in adults as genuinely as it does when they play music. In particular, improvisation is nothing more than playing with all available components of a given contexts. Optimally tested- live in front of children young and old- Karl Seglem and Christoph Stiefel Group presents this double album with two separate parts, each of which belong together in content and aesthetics, but stand for different angles of the musical process. The first part is entitled Hopp (and smile!). Although it is based on how children experience music, it is explicitly aimed at the experienced listener, one who knows how to consciously focus his or her spontaneous perceptions. The second part is titled Monsterjazz- An Interactive Jazz Journey for All Ages. It contains the Monsterjazz program for children. The playful program makes the listener feel like they're digging in a huge wooden box of colorful marbles. What could be hidden under the visible?