Invisible pens with built-in purple lights.

Batteries included and installed.

Please BE CAREFUL with small items: Children above 3 years.

Write Your Secret Message These invisible ink pen with purple light will write your secret message.

Once your secret message is written with this spy pens, wait a few seconds shine the light from the cover of the pen and REVEAL MYSTERY OF THE SECRET MESSAGE.

Besides, This design with the built-in LED on every pen.

This makes every individual marker a complete system for creating and reading invisible messages.

Safety for kids Safety and tasteless ink, the ink is a food-grade pigment, healthy for your kids! Smooth disappearing inks on t-shirts, paper, skin and any surface! These washable invisible pen now come in an improved Ultra-Clean formula that washes easily from skin, clothing, and walls.! With 24 or 32 each package, you can easily host a kid's birthday party, treasure hunt, escape room,or classroom activity complete with invisible ink clues!