Spreading kindness by hiding decorated rocks continues to be popular, and this new kit adds a funky twist! Set includes 10 natural river rocks, 16 patterned hydro-skins, and tracking stickers to label rocks before hiding. Simply cut out the hydro-skin, float it in water, drop in a rock and wrap the skin around it. Let dry, add tracking sticker and put it in the world! No need for sealant.