I bought the calendar for my 8 year old daughter and was very impressed at the beginning of the idea of having to find the respective calendar door by the unraveling of daily tasks. However, we quickly realized that these puzzles were too easy and have my daughter not even begin to demand. In one would still be able to overlook, if the content had not been shown behind the door as absolute junk. Cheap plastic parts such as tweezers, masks, a secret chest, a stamp or a seal ring alternated with completely liberated sense and unattractive features like !! Knisterfolie !!, a cobweb-dummy and a "highlight" a test strip for the detection of real blood at a crime scene, which you can use exactly once.
This continues and so forth is the required before December purchase price of 36, - (now the price has been lowered) not nearly worth. Conclusion: From buying this calendar, I can only advise.