The Reason Behind the Behaviour
I was at a facility recently and the staff told me that they were having trouble finding activities for one of their dementia patients. The resident said that every activity that they offered was too childish, even though they were selected to be age appropriate. After sitting with the person and trying different things with him, it turned out that the real problem was that he was having trouble with his hands and couldn't pick up the pieces for the activities. Saying that they were "childish" was his way of avoiding the problem.