Durable for use in all outdoor environments, these tactile stones show a simple image of a cooking process on one side and a related word on the reverse. Ideal for introducing key vocabulary, the stones can be easily lined up to show the stages of a recipe, indicating an area for a specific task or allocate tasks. Made from a unique stone and resin mix, each set contains ten process stones: bake, cook, crush, cut, measure, pour, roll, spread, stir and whisk.