Hospital are known by children as a place to get their treatment. Besides that there is nothing to do for them and they get bored fast. Sometimes children who just had their chemo therapy are physically weak, but are most of the time able to play around. The Princess Maxima Centre has a vision to give the children the feeling that they are in a playing ground instead of an hospital. Besides that it is important for the children to develop physically, intellectually, spiritually, psychical and emotionally just like other children in a clean, safe environment.

KiWallKa is a fun interactive wall to let children forget about their disease and focus on being like a regular child who plays and develops. It is a wall which initially is a physically playing environment for children. Furthermore, children are able to explore and learn about the secrets within the wall by playing with such things as perspective, puzzles and interactions.