Interesting Spy Activities For Kids：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
Safe for kids:Safety and tasteless ink. Smooth disappearing inks on t-shirts, paper, skin and any surface! Washes easily! Fun for birthday party,treasure hunt,escape room,or classroom activity complete with invisible ink clues