Lets Investigate: Seashore Sensory StonesThese durable Seashore Sensory Stones are ideal for investigative play outdoors and indoors: you can dig them up, create a mini rock pool, use as playdough stamps, and as rubbing plates with crayons and pencils. Designed for use with sand, soil, mud and water This Seashore set includes an auger shell, crab, jellyfish, lobster, nautilus shell, seaweed, starfish and whelk shell. These tactile stones are a perfect way to bring nature inside the classroom