During our 2007 stay in Ghana's capital Accra, Sporting Opportunities volunteers would regularly visit an orphanage for underprivileged children run under the umbrella of charity 'Right To Dream'.  Here we would spend an afternoon with the kids, teaching them stuff, constantly mark their work and give them more [they couldn't get enough!].  As a donation, we gave a short tennis set for them to play with at their break times which was also used for weekend games and their sports days.