Children from Baan Gerda perform at a charity ball in Bangkok. a class="link" rel="nofollow" href=". They learnt to play musical instruments several months ago using the innovative Orff Schulwerk method. Baan Garda is a children's charity providing care for HIV & AIDS infected orphans. The small community is based in Lopburi province in Thailand. Orff Schulwerk (or Music for Children) is a unique approach to music education developed by the composer Carl Orff.