Our 4H group helped out some folks in the community who were unable to rake their own yards.  We finished 4 yards in about 3 hours with many helpers.  Towards the end of the last (and largest) yard, the kids were enjoying the piles immensely, but I think I was the only adult to jump in.  They don't know what they're missing...  We also were able to get the neighborhood newsletter delivered, along with about half of C's Girl-scout cookie orders.  Fun and productive is a good combination.