This is a pack of air dry modelling clay is ideal for the classroom as it does not require baking and will dry hard when left in open air. It is easy to use - simply knead the material briefly and form it. The clay is slow drying so you can take your time forming it. It is super soft so shaping is an absolute doddle. It would also be suitable for schools and for children over the age 3 and under adult supervision. . Will harden in air in 24/48 hours depending on the thickness of the surface created. . Decorate with oil colours, acrylic paints, gouache and watercolours. . pack of 12.5kg