"A simple tutorial on how to drill holes through small beach or river rocks." So you can spice up that rock collection by drilling holes in each of them! I had to post this. the utterly ridiculous crafts I see on pintrest
To make a river stone mat first you have to gather or purchase river stones. After that take a plastic mat and arrange all the stones on it. Then stick all the stones one by one to the plastic mat by using silicone sealer. Let the sealer dry completely.