Well, online help is at hand if that is the case! The Kuriositas Kids have recently come across a wonderful website call Culture Crossing. No matter where you are heading in the world they have some great tips for you so you don't have to worry about putting your foot in it (whether it is your mouth or something far, far worse).
There is plenty of information at the website at the moment but if you want to join in yourself then you can become a member and start letting people know the dos and don't of visiting particular countries. If you don't want to advise but simply ask then there is a Q&A facility too where you can ask nationals from the countries concerned anything you want (well, within reason of course!).