Be very wary of what you might be getting into if you go for a project with a charity you don't know anything about. You have used search criteria that might bring you into contact with some dodgy characters online - sadly, paedo's use charitable working abroad as a cover and a means of avoiding detection in Britain. Stick with VSO or one of the main charities like Save the Chidren. Apologies in advance to all the good nice people who work with disadvantaged children the world over, but this is the reality of the age we live in.