4434-EU Invisible Pen and Light
The product is available only online
- © Kikkerland
- Ever wonder what the perfect pen is for math nerds? Here she is!She writes in invisible ink and has a secret flashlight to illuminate those mega unmemorable pyramid volume formulas (for example). The pen is made of stainless steel and is quite heavy. It writes softly and has a UV flashlight, which is recommended not to point at your eyes. Write the secret formula, illuminate it with the UV flashlight and read the message. Works flawlessly every time!And the formula is V = 1 x B x h - remember it for the next test.
- • Material: metal
• Size: 14 cm
• UV light