I volunteered through OXAB which stands for Oxford Aid to the Balkans and is an organisation run by Oxford students for Oxford Students, all they do is liaise (or however you spell that) with the orphanages, it's good cos you don't pay them anything. So when looking for something try to do as much of the organisation yourself as possible, so where to stay and stuff cos it ends up so much more expensive if you pay an organisation to do it for you. Good Luck!