And stocking stuffers should ideally cost below $20, so at just $8 for a six-pack, this set definitely fits the bill. Invisible ink pens are just as cool now as they were when we were kids.

Pack of 24 Invisible Ink Pen and Notebook - This top secret UV pen set includes 24 spy pens and 24 mini notebooks. The invisible ink pens have 8 colors to choose from: blue, black, red ...

"I bought the Maleden Invisible Ink Pens for my four grandkids and they all love to use them to write secret messages," wrote another five-star reviewer. "I have to admit, at 66 years old I kinda like ...

In this video, I used a Smiggle spy pen with invisible ink to create a hidden doodle that only shows up under UV light! ✍️🔦 It was a challenge to draw without seeing everything right away, but the ...

Its creators were trying to create an eco-friendly alternative to printer ink using algae, but ended up creating invisible ... set, which comes with everything you’ll need including both pens ...

Geek Life: Fun stories, memes, humor and other random items at the intersection of tech, science, business and culture. SEE MORE Lines drawn with Living Ink’s algae pen disappear in about 10 ...

And stocking stuffers should ideally cost below $20, so at just $8 for a six-pack, this set definitely fits the bill. With over 6,300 five-star ratings from Amazon customers, the Maleden Invisible Ink ...