Treasure Rocks

1 1/2 cups flour
1 cup used coffee grounds
1/2 cup salt
1/4 cup sand
1 cup water
Food color paste, if desired
Glitter (optional)

Mix all ingredients together, and mix until the consistency of bread dough.

Drop a large spoonful of the dough onto a wax paper lined cookie sheet.

Make a hole in the center and put in a treasure (dimes, quarters wrapped in plastic wrap, but anything can be hidden in them).

Cover hole with a bit more dough to completely hide the treasure. You can sprinkle glitter on them at this point, if desired.

Air dry 2 to 3 days until rock hard. They dry faster if you put them by a heat vent or other warm spot. They shrink somewhat as they dry, so make them large enough to allow for the shrinkage.

Makes about 8 rocks.