Lonely Planet has released a great new series for junior travellers, which is well-worth a look.
There's the big travel book that gives lively and fascinating information on each country.
There's also individual city guides with the kind of information that kids will find particularly interesting.
For example, did you know that in 1938 a boa constrictor took a ride on the Paris Metro - "unaccompanied and without a ticket." Also, that underneath Paris are the Catacombs - which contain the bones of about six million people! Most of the bones have been very artfully displayed.
Then, more recently in 2010, some environmental campaigners built a hotel out of rubbish they collected from European beaches.
This is just a taster of the fab facts available in these books.
There are also guides to New York and London.