GIFTINBOX Invisible Ink Pens with UV Light – 12 Pack Spy Pens & Notebooks for Kids Secret Messages & Party Favors
GIFTINBOX Invisible Ink Pens with UV Light – 12 Pack Spy Pens & Notebooks for Kids Secret Messages & Party Favors
This 12-piece spy pen set from GIFTINBOX comes with invisible ink pens and matching mini notebooks, letting kids write secret messages that appear only under a UV light. Each pen has a built-in purple UV LED, and the set includes six ink colors: blue, black, red, yellow, green, and purple. The detective-themed notebooks include maze puzzles and arithmetic problems, making this kit suitable for kids ages 4–12 (recommended for ages 8–12). It works well as party favors, classroom prizes, or for spy-themed games at home.
What’s inside the spy kit?
- 12 invisible ink pens with UV lights (1 of each color per set, with two of some colors? Actually the 6 colors are spread across 12 pens, so likely two pens per color)
- 12 mini notebooks with detective cover designs
- Each notebook contains maze puzzles and simple arithmetic problems to solve
- Pens require no batteries – the UV light is powered by the pen’s internal battery (type not specified)
How does the invisible ink work?
Write on paper (or other surfaces) using the pen – the ink dries clear and invisible. To reveal the message, press the button on the pen to turn on the UV light and shine it over the writing. The purple UV light makes the ink glow, so secret notes become readable. The ink is permanent once dried, but also washable from skin and most surfaces, so kids can experiment without causing permanent stains.
Why the notebooks add extra fun
Unlike blank notebooks, these mini pads come pre-printed with maze puzzles and arithmetic exercises. Children can solve the puzzles with the invisible ink, then check their answers by shining the UV light. This turns the spy kit into a problem‑solving activity, not just a writing toy.
Great for parties and gifts
With 12 identical sets, this pack is ready for group play – ideal for birthday party favors, goodie bags, or classroom rewards. The spy theme works for escape rooms, treasure hunts, and detective games. It also makes a thoughtful birthday or Christmas gift for kids who enjoy mystery and role‑play.
Are the pens safe for kids?
GIFTINBOX states the ink is harmless and flavorless, so it’s safe for normal use. The pens are designed for children, and the ink washes off skin with soap and water (though it’s permanent on paper). As with any small parts, adult supervision is recommended for younger children.
Spy pen kit at a glance
| Brand | GIFTINBOX |
| Writing instrument form | Ballpoint pen |
| Ink colors | Blue, black, red, yellow, green, purple |
| UV light color | Purple |
| Number of pens | 12 |
| Number of notebooks | 12 |
| Age range (description) | Kid (recommended 8–12, suitable for 4+ with supervision) |
| Notebook features | Maze puzzles and arithmetic problems |
Common questions about this spy set
Can the invisible ink be used on skin?
Yes, the ink is washable and safe for skin, but it may take a few washes to fully remove. It’s non-toxic and flavorless.
Do the pens come with batteries?
The UV light is built-in and powered by small batteries (likely LR41 or similar). The product does not specify if batteries are included, so you may need to check the package or have replacements ready.
How long does the UV light last?
Battery life is not stated, but typical button cells in such pens last for several hours of intermittent use.
Are the notebooks refillable or single-use?
The notebooks are not refillable – once filled, kids can use the blank backsides or extra paper with the pens.