Found this recipe here:
Rock-Hard Sawdust Clay
2 cups sawdust
1 cup flour
Mix two parts sawdust with one part water. Add water, until the mixture
is stiff, but pliable. If dough is too crumbly, add a little more flour.
Dump the mixture on a newspaper-covered table. Knead until it reaches an
The dough may then be molded into any shape desired, then dried in the
sun. As it dries, it will become extremely hard. After drying, it can be
sanded and painted, or simply painted, depending on preference. Once the
paint dries, an acrylic finish will make creations shine.
I haven't tried this yet, but intend to. The other recipe I saw
called for wallpaper paste - which would mean something extra to buy.
This one uses flour, which most people already have. If it works as
described, I can think of several ways to use it, right off the top of
my head - as long it doesn't turn out to be brittle, that is, but even
if it is, I can still think of a use or two..
The Truth Shall Set Ye Fret