On our site we have information on how you can sponsor a child with World Vision.

Sponsor A Child
Why should I sponsor a child?
How can I set up child sponsorship?
There are quite a few child poverty charities in the UK that offer child sponsorship and it’s really easy to set this up online. You can often choose the individual child you’d like to sponsor and then set up an automatic payment in the same way that you might make an online donation.
Can I contact my sponsor child?
Often child sponsorship is about more than donating money. Most charities encourage you to write to your child, because for children living in poverty it means a lot to receive letters.