We're going to visit London at Easter with our three young kids in order to show them at least the most important sights in the city and I bought this to spark off an interest in them, and what a success. My 8-year old twin girls just love me asking them to find the card about one of the 50 things to spot. Once they've found it they love reading about the place in question in order to tell me something interesting about it. They already know more about London than Barcelona which is where we live! I'm not sure if similar cards exist for other important cities, but I'll be trying to find out for further trips. Even I've learnt a thing or two!