Well I'm looking for a few ideas. When I was a little boy my Dad made me a skiboard. Basicly a cut down sheet of marine-ply that he cut a round nose and tied a old ski handel on and the rest of the old ski line attached from the underside then ran to the ski hooks on the boat. Dad would go at an easy pace to keep most of the board in the water so it dodn't go all over the place. The only problem was when you fell of you would have to sit there for awhile till it would surface.....it really subarined!!! We'll my oldest daughter is now 5 and would like to get her started.......Here's what I'm thinking. Two sheets or luan with rigid foam between. Then epoxy resin and covering the whole thing with fiberglass. This I believe would be strong ehough and much more likley to stay on the surface........What ya' think????