I took the Singapore Sherlock Holmes game with kids ages 11 and 8. The game was very engaging, the riddles were fun and just right for their ages.
Completing the game takes quite a while, it covers big distance, we made several stops for food, drinks and toilet. The whole thing including the breaks took us over 4 hours, so be ready for a long walk.
It was a good opportunity to visit Chinatown, the game covers most of it, including small streets and hidden corners.