Things needed :
v Fine sand
v Two paper cups
v Epsom salt
How to make ?
v Take a paper cup. Drop 1 inch of fine salt into it.
v Fill another cup with water about 1 inch high.
v Add Epsom salt slowly with stirring still no more salt dissolves.
v Pour the Epsom salt solution over the sand in the cup. Stir well.
v Place the mixture in a place where it will dry.
v It will take few days to dry.
v When it is completely dry, take the paper cup away from the sand.