With this set you can spray your own tattoos in many colors - easy to apply and wash off again. Put the felt pen in the airbrush gun. Then place a stencil on the skin. Fix well. Press the button and start spraying with the airbrush gun. Safe to use. Great for Play-dates, Gifts, and more. Enhances your Child's Fine Sensory Functions. Encourages ShaRings and Cooperation, Self-expression, and Learning. Stimulates Creativity, Curiosity, and Discovery.