We sponsor a child through 
Compassion International.  In the past (before children) we sponsored one through World Vision.
A few years ago, one of my kids' teachers asked for donations towards the World Vision catalogue instead of Christmas presents.  She read them a story about giving (can't remember the book title now).  Almost all the students brought in donations.  She collected a fair bit of money, much more than would have been spent on her teacher presents, plus she got a couple of presents too.  She was able to buy some chickens, a goat, and some rabbits if I remember correctly.