TIDALJAM 32 Pack Invisible Ink Pens with UV Light – 8 Colors Secret Message Writing Detective Party Favors for Kids

This 32-pack of invisible ink pens from TIDALJAM gives each pen a built-in UV light, letting kids write messages that stay hidden until lit. With eight neon colors and four pens per shade, the set is designed for group play, party favors, and detective-themed activities for children ages 6 to 12.

What Comes in the Box

The complete set includes 32 pens, evenly split across eight colors. Each pen has a small UV light in the cap to reveal the ink. No batteries, extra lights, or special paper are required — everything works straight out of the package.

• 32 pens total (4 per color)
• 8 colors: the exact shades are not specified, but the set offers a rainbow of options
• Built-in UV light in every pen
• Non-toxic invisible ink
• Suitable for ages 6 and up (per manufacturer recommendation of over 3 years)

How the Invisible Ink Works

Write a message or draw a picture on any light-colored paper. The ink dries clear and invisible to the naked eye. To read the secret message, switch on the UV light in the pen cap and shine it over the writing. The ink fluoresces under the light, making the hidden content visible. The effect works best in dim or dark conditions.

Who Would Enjoy These Pens?

These pens are a natural fit for mystery-themed parties, spy games, and treasure hunts. Teachers often use them for classroom rewards or creative writing prompts. The set is equally popular as Halloween goodie bag stuffers, Christmas stocking fillers, and birthday party favors. Because each child gets multiple pens in different colors, the set works well for groups and classrooms.

Using the Pens with a Group

With 32 pens, there are enough for a class of 25 plus extras for the teacher. The eight colors allow kids to code messages by color — for example, blue ink for clues, green ink for answers. The UV light in each pen means every child can read and write independently. No additional supplies are needed.

Are There Any Safety Concerns?

The ink is described as non-toxic and child-safe. The pens are recommended for children over 3 years old. As with any small object, supervision is advised to prevent accidental ingestion of the cap or pen parts. The UV light is low-power and safe for occasional use, but it should not be shone directly into eyes.

Quick Specs

Frequently Asked Questions

Do I need extra equipment to reveal the messages?

No. Each pen has a built-in UV light, so the pen itself is both the writer and the reader.

How many pens are in each color?

The set has eight colors, with four pens per color, for a total of 32 pens.

Is the ink safe for children?

The manufacturer states the ink is non-toxic and the pens are recommended for children over 3 years old.