It's so much fun that the money is just icing on the cake. There seems to be a lot of icing.
Nowadays people seem to switch schools, either because they have to, and certain schools only serve certain grades, or because they move to a different place or have some particular interest, but I was in the same school for 13 years.
But most importantly, we can all be donors. It does not matter how old you are, your race, where you live; all of us can give the gift of life.