NiArt Double Tip Invisible Ink Pen Set: 8 Latest Spy Pens with UV Light for Secret Messages and Information - Perfect for Kids' Parties and Gift Bags on Special Occasions

✔【8PCS Dual-Tip Magic Pens】This set includes 8x reusable invisible ink pens in four distinct colors: pink, yellow, green and blue. A UV light and a power switch are integrated inside the lid. Each pen is individually wrapped and ready to use with three AG3 batteries provided. The spy markers help improve children's color cognition, fine motor skills, creativity, hands-on ability and imagination.

✔【Secret Spy Message Writing】The magical invisible ink pen allows you to write secret messages and hide them. The ink is invisible after you write words or patterns with it unless you turn on the UV light on the cap to reveal the secret messages. The other end of the pen is a ballpoint pen, which can be used for everyday writing. The cool spy gear is easy to use and perfect for young people. WARNING: Choking Hazard - Small Parts. Not for children under 3 yrs.

✔【Easy & Fun Games】Kids can write a message using regular ink available on one side of the pen and another secret message using the invisible ink on the other side, which can only be seen under ultraviolet light. It is easy for kids to learn the various aspects of the pen and once they know, they’ll go crazy writing messages. This a great way to introduce UV light and UV-sensitive materials.

✔【Safe Invisible Pens】Permanent but washable! The invisible ink is smooth and works on T-shirts, paper, skin and any surface! It is harmless, odorless and is a healthy toy for children! Keep the pens capped to prevent the ink from drying out when not in use. The batteries can last a long time. A small Phillips head screwdriver, such as those found in eyeglasses repair kits or at a hardware store, is required to open the compartment to replace the batteries.

✔【Great Gift】Kids can enjoy playing detective spy activities with these spy pens even on sticky notes and they will be ecstatic to participate in a variety of fun activities. This pen set is perfect for birthdays, Halloween, Thanksgiving, Christmas, Easter, carnivals, children's activities, school celebrations and many other occasions. It can also be a surprise present bag for kids or stocking stuffer for RSVP wedding invitations, spy party candy bags and more.