Green me up, Scotty!

My son's 4th birthday is coming up and we decided to ask the guests (a modest party, by today's standards, by the way, but he only wanted 3 guests. What sane parent is going to argue with that?) to buy a UNICEF gift of magic (one of a list of necessities, basically, for a child in need elsewhere) instead of buying a gift for him. Don't worry, he'll get lots of gifts from his family so he won't be neglected...