I purchased the kit for a 89-year-old man. Just to describe the box he was wide awake and was then time not wait until the last box had been there. Now he is working on a daily basis for hours with it, trying "to find a system" does not want to simply rebuild (which he also prepares difficulties), but wants to create their own creations. Just "old" people with mostly already significant "memory lapses" find with this kit more than just a job: they have to also dexterity, endurance, much mind (balancing of Klötzern) and another show, quite "accidentally". When people grow old, they are again "like children", and that is a natural one. But now they can do that, which was not possible during her childhood, for example, because of poverty and war. Give these people a piece of unexpressed childhood now catch up, and you will feel deep gratitude.