Be a secret agent with our ALLYDREW Set of 4 Invisible Ink Spy Pen with Built in UV Light, Secret Message Writer. Children will love playing spy with these invisible ink pens; they also make great party favors, too! Write secret messages and clues with them on paper, skin, and even T-shirts. Shine the UV light at the end of the pen’s cap to reveal the secret message.

• INCLUDES: 4 Invisible Ink Pens (choose your color)
  
• SAFE: Ink is non-toxic, environmentally safe and tasteless
• USE: Write a secret message with these spy pens, then shine the UV light from the cap when you want to see the message. Can be written on paper, t-shirts or skin.
• SIZE: 5.5"L with UV light cap on
• GIFT: Makes a great party favor for children and adults. Reveal hidden messages and write secret notes.