We have sponsored child from Po Leung Kuk, World Vision and Oxform. For Po Leung Kuk, you may choose the gender and age of the child you sponsored. You need to attend a training course before visiting the child. You can also visit the child with your family. World vision will ask the child to send you a card in christmas, etc. It allows you to interact with the child. I think both are good, it depends on whether you want to sponsor child in Hong Kong or less developed countries.