Trying to explain the concept of charity to a four year old

This is a subject I have been talking a lot to Jaida about recently. Mostly because she is four and is entering that phase where a lot of little kids sort of live in a self-centered universe. We have always made donations to various charities, etc. We give to the toys for tots campaign during the holidays and stuff like that. Though honestly it really has not made quite the impression on Jaida that I was hoping for. If at all possible I try to avoid having Jaida be involved in monetary contributions to charity mostly because she has very little concept of how much money it takes to buy stuff and secondly she has a hard time wrapping her little mind around the fact that there are kids and adults in the world that do not have as much (food, clothes, love) as her. It is all hard for her to understand.

Our church does a lot of social activism work (for our local area) and the children are pretty involved through the religious education program. Still I feel the need for Jaida to understand just how fortunate she really is and to find a better way to help her understand ways that we can help other people (on a global scale). In my endeavor to achieve both these goals I found this website. You purchase your child an on-line gift card and then they use that gift card to shop on the website to buy things that can help other people. I think it has more overhead charges than I normally like but I think this is a good way to help Jaida understand the global enormity of the problem and how a simple thing can really help.