I purchased this item for my children 4 and 7 year old. The game is for 1 person at the time, which is good if you want to occupy one of your children. Not for a company, unless children have patience to wait their turn for a challenge. The challenges are divided according to a difficulty level. My 7 year-old fully completed master level (so I would say the chllenges did not seem very complicated, which on the other hand could be considered as a positive thing - child does not loose interest for a game and don't get frustrated). My 4 year old could finish some of the juniour(the first level) challenges. It's stated on the box that game is for 3 to 99. This probably would be an overstatement:))) I did not fell that "chalenges" were actually challenges for me to complete(seemed way to easy:))) Even though they've got me engaged me in a game. The time indicated (time that you may spend resolving a challenge) probably are for the younger public as well:) But as a game - it's interesting, engaging, stimulating and keeps your mind excercise:) Happy with the purchase.