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This fine point marker, is loaded with special ink that is only visible under UV light. It includes a mini LED UV black light with batteries, so you can view your messages.
Children think that they are secret agents with these pens, lay mystery adventures and writing clues for each other. You can make secret messages with your friends. The pens also can be used widely.
Perfect theme for a fun party favor, for drawing, secret message writing, currency checking, security marking. It is a great gift for your lover, family and friend.
Remove the cap
Our Invisible Ink Pen comes with full invisible ink, once the cap is removed, the marker is ready to be used. Make sure to place the cap back on after finished writing your message.
Write your secret message
You will not be able to see the message, but it is there! Write as you normally would, but if you need guidelines, use the UV light to continue! You can write in ANY surface.
Turn the UV light to reveal message
The UV light is located on the cap of the pen, and it comes with batteries included, switch the button on/off and reveal your secret messages with ease.
HeroFiber Invisible ink pens
1. Write down secret information with a pen. Don't worry about being discovered
2. This non toxic and tasteless ink is a safe toy for children
3. Can be used on fabric (T-shirts), paper, skin, or any smooth surface, permanent ink but washable!
4. Children love these spy pen kits
5. Use this pen to keep secrets and play detective games
6. Perfect gift for children at parties, school, giveaways, or other events
M.E.
August 14, 2025
This was a big hit! I used as birthday favors. The quality was good for both pens and more pad. Kids loved them. It's recommended!
Ann2021
June 30, 2025
This was perfect to include in the giveaway bags for my girl's (8yr) birthday party. There were boys and girls of different ages and they all enjoyed playing and making secret messages and even invented a scavenger hunt with secret clues. Glad with my purchase!
CoffeeSnob
June 25, 2025
This is not super high quality but great for party favors or other small gifts. The pen is more like a marker but still suitable for writing or drawing. All in all, this mom and a dozen eight-year-olds were very pleased!
Kbator
April 28, 2025
I didn’t even realize these were “invisible ink†pen and pad sets until they arrived, but this makes the purchase even better! My 4 year old loves writing secret letters for me to “find†with the special light and my 7 year old son actually said he read the note I put in his lunchbox because I added in the pen with the light and the secret message must have been way more exciting than my normal notes. This was a great addition to my 4yo daughter’s paw patrol birthday because the simple paw prints made it a favor for kids of all ages!
Danielle Leno
March 15, 2025
Perfect gift for the kids!
The Bleekman's
February 25, 2025
My yearbook students loved these pens. They felt like spies.
Oya
February 21, 2025
Great for class gift! Love them! Good alternative to the generic pencil and eraser
Brianna
February 2, 2025
Perfect for birthday goodie bags
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