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Mad About Science

Invisible Pen

$4.50
Afterpay

I LOVE anything that inspire a child's imagination and if its something that will encourage them to learn whist playing... THEN THAT IS EVEN BETTER.

Its one of reasons I LOVE these awesome pens, they have captivated Williams attention in a big way. First it was about drawing secret maps for pirate treasure and now he's trying to write secret messages. I can just image that soon he and his friends will be writing each other secret messages and pictures.

This wonderful world of a child's imagination is awesome... and while they are playing they are learning, working on their writing skills, concentration and so much more.

Their secret messages that can only be read using the UV micro light on the ends of the pen.

The invisible ink from the pen only fluoresces under ultraviolet light, so it is easy for them to keep messages top secret.

Ages: 5+

What you get
Invisible pen, UV micro light

How does it work?
Different light has different wavelengths. Ultraviolet wavelengths are very long with a very high frequency. When this UV micro light, or black light, is shone on the invisible ink from the pen, the fluorescent ink lights up with a beautiful greenish-blue luminescence. Sun light and light from incandescent bulbs do not excite the fluorescent ink and it remains invisible.

Teach
Ultraviolet light demonstrations.
Different wavelengths of different light.
Wavelength frequency.
Fluorescence.
Valence electrons.

FAQ
Invisible ink can removed from surfaces using soap and water.

 

 


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