affordy collection UV Light Invisible Colorless Ink Pen Glow in the Dark(Set of 6) Calligraphy  (Pack of 6, Ink Color - White)

Kids will love these spy pens. Kids will love using this pen to keep their secret while playing detective spy games. Invisible pen brings you an amazing variety of fun activities, from Surprise birthday parties, to revealing a top secret message to their parents or grandparents.You can write on Paper, Skin, Cloth, Wall etc Once your secret message has been written with this invisible ink pen, shine the built-in UV light from the pen's cover and reveal the secret message.