We have a volunteer who has been with us for quite a while. Looking back over her hours, I noticed she had worked over 1000 hours. My coworker, Betty Baker, thought it would be a neat idea to collect pennies -- one to represent each hour she had worked. We presented them to our volunteer in a clear flower vase that we had around the office and tied a red ribbon around it (our organization color). It was a very inexpensive way to show how much we appreciate what she has done. It also helped present the number of hours she has dedicated in a tangible way. It's amazing how much longer 1000 hours seems when you look at it this way. If the volunteer doesn't want to keep the pennies, it might be a nice gesture to donate that amount of money to a charity of the volunteer's choosing in his or her name.