I'm a 57 year old man who never plays video games - I bought the Diabolical Box on a whim. Most of my use of the DS was for the 'brain game' type products. It began to feel like I was doing it because it was good for me, not because it was fun. So, I tried Diabolical Box. In truth, I thought the story a tad silly but it served as a platform to get from puzzle to puzzle and as such did it's duty. The puzzles though were a wonderful mix, almost all completely different from one another, they were challenging enough to keep the process from feeling childish. They taught me, again, the lesson of reading carefully, something I need to be reminded of. For me, it took just over 15 hours to beat the game. I didn't understand the 'tea' stuff and at no point was it required to put together the camera and the points added up but served no purpose - minor irritants though. It was 15 hours of pure diversion - and I suspect just as good for the brain as the other more 'serious' games.