Terracotta Air-Dry Clay is a fine, natural clay that dries to a hard solid over two to three days. It is easy to use with traditional modeling techniques and also a snap to clean up. Air Dry Clay lets young artists create Terra Cotta sculptures without the hassle of a kiln or oven. It is smoother, finer and more moldable than traditional clay. Dry pieces can be painted or varnished. This Air Dry Clay works well with other Crayola products, including tempera paints, acrylic paints and watercolors. Children can paint over entire slabs or add simple accents to create a colorful final piece of art.