Combine sand with flour, water and white glue to make a no-cook dough that can be used to make gritty sand-like sculptures.
Measure out another cup of sand. Add it bit by bit, kneading in the additional sand into the dough. You don't need to put in all the sand, stop when you reach the desired consistency of the dough.
In case you've added too much sand and the dough becomes dry, adjust by adding a bit of water.