Premium quality stone (grey) air dry clay reinforced with fibres to provide stability to hand-building projects. No kiln required, projects will dry in 24-72 hours depending on size. Suitable for use by children 4yrs+ to adults. Vacuum packed for longer shelf life. Ideal for beginners, hobby potters, those wishing to add additional clay to our pottery kits or make extra projects. If you're looking for pottery project ideas you might like to try our pottery starter kit