Very long User Interaction

Playful user interaction = very long user interaction

1. The combination of
   1. Concept-/Mindmaps +
   2. Content +
   3. Design- and gamification elements +
   4. Multilayer mind maps
   leads to ->
   5. A playful investigation of the maps.
   So readers delve into the universe of
   one topic and explore it driven by their individual
   interests. This results in far above
   average user interaction times.