I went with Children Without Borders to Costa Rica a few years ago, and it was truly a rewarding experience. I was only 16 at the time, and there was still plenty to do and help with despite my inability to help medically. Everybody involved was courteous and the children were so appreciative of the aid that Children Without Borders was providing. I highly recommend volunteering for this organization at any age. No matter what you do you make a difference, and it is truly rewarding.