These are two sandboards that I made over the past year. The one on the left is generation one. My uncle broke it when he tried to turn really sharp. The bottom of that one is waxed wood. On the right is generation two. That one worked better than generation one, and the bottom is waxed Formica. I followed the instructions on this website: http://www.sandboard.com/drdune/makeasandboard/index.htm
and another site that I can't find at the moment for some reason.
Thanks for looking.
UPDATE: 10/9/08 I found pictures of me going down the dune. It hurts to fall without a shirt on.