The ‘mystery’ (for kids, mainly) is done by the SCStyle Invisible Ink Pen.

This magical invisible ink pen allows you to write down your secret information, which no one see, even if they’re watching you write it. Once Write your secret message with this pen’s invisible ink, the words or patterns you write will disappear, But then, press a button on the pen’s cover and the secret message is revealed! It’s a great spy gear for kids.

The company says the UV light is harmless. The colorful inks disappear on t-shirts, paper, etc! Permanent but washable! You can buy various packages, but for parties or a classroom full of kids, the cheapest seemed to be 21 pack for $19.99. Recently, there have been discount coupons to click on right on the Amazon page, but that could change at any time.

Giz Wiz Video: https://youtu.be/pfhDrnIas0Y

Check the latest price on Amazon: https://amzn.to/4h0i8Ev

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