Travel with Children
Children aged under five are exempt from the minimum daily tariff and five-to-12-year-olds get a 50% discount, so it needn't break the bank if you bring kids along. Kids may become bored with long, monotonous drives, limited availability of TV and the internet, and little other entertainment available. On the other hand, they will be immediately accepted by local kids and their families, and they could make many new friends. Lonely Planet's Travel with Children has lots of useful advice and suggestions.
Bhutan Land of the Thunder Dragon, by Freda Ferne, is a children's book on Bhutan; see www.bhutan-an-introduction.co.uk if you want more info or wish to buy.