I remember doing that, and being starving! It's a good cause, but personally I have a problem with this form their "about us" section...
"Motivated by our faith in Jesus Christ, World Vision serves alongside the poor and oppressed as a demonstration of God’s unconditional love for all people."
Given that religion causes or apologises for so much of the suffering in the world, I don't agree with their motivation. I don't need an excuse to want to help people who are suffering - my humanity motivates me and it doesn't come from Jesus Christ or any other fictional deity. If people have faith, that's their choice, but we do not need it to help others.