I can totally see why this game was endorsed by Mensa. I bought this for my 5-year old's birthday and we just opened the box. The pieces are very nicely made, and feel high quality. It took some time teaching my son how to play the game, but he eventually picked up the basics. While it is a simple concept, there are definitely strategies that can be enacted to make this game more complicated and technical than it looks. For this reason, I believe that it would be enjoyable for a range of ages, from 5 to 100+.