* 1 cup flour
* 1 cup used coffee grinds
* 1/2 cup salt
* 1/4 cup sand
*up to 1 cup water
* various treasures- small toys
Combine flour, coffee grounds, salt and sand. Slowly add enough water to make a stiff dough; you may only use half to 3/4 of a cup of water. Add it slowly to avoid a runny mess!
Knead the treasure
Hide toys and surprises in the center of each ball of dough. Let dry 2-4 days. Once it has completely dried, it will look and feel like a rock. If you're quite impatient and want your stones to be finished quickly, simply place in the oven at 170F for 15-20 minutes. Cool completely.
Break open the home-made rocks with a hammer to reveal the hidden treasures inside. This is lots of fun for the kids!