Wrapables Invisible Ink Pen with UV Light, Spy Pen for Writing Secret Messages (Set of 4)

Kids will love playing spy games with these invisible ink spy pens. The pens come with safe and non-toxic invisible ink that can only be seen when you shine UV light from the cap of the pen on it. Write secret messages on paper, T-shirts, your skin, or just about any hard surface. The ink is permanent yet washable and flavorless. Makes great party favors, UV light comes with batteries. Pens are approximately 5.5 inches long. Write secret messages with our spy pens. The spy pens have invisible ink which only can be seen by shining UV light from the cap on the secret message. Permanent non-toxic ink, can write on paper, skin and even T-shirts. Great as party favors. Kids will love playing spy games with these pens. Material: Plastic, Non-toxic invisible ink, UV Light Cap. Set comes with 4 pens.