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 ...

The SCStyle Invisible Ink Pen set is a perfect gift for large groups of children. Other invisible ink pen products may have designs, ultraviolet lights or ink hues that better fit the specific ...

"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 ...

Those who pledge $30 will be able to obtain the early bird special on the Living Ink set that comes with the fast and slow pens, 5 sheets of paper, the Greenhouse and instruction guide.

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 ...

For example, students could use invisible-ink pens to work on their handwriting. If they went outside the lines as they were practicing their letters, the paper could turn red. "Skinner was really ...

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 ...