With this awesome hack you can send secret messages to someone or even cheat in class tests.
Step 1: THINGS YOU WILL NEED
An invisible ink pen with its light
A push button(you can find one in old electronic junk)
Step 2: Invisible Ink Pen
First we need to separate the light (top part) and the invisible ink pen as you can see in the picture above. We also need to get led and small cells out of the top part.
Step 3: Eraser
Cut the eraser as shown in the above picture.
Step 4: Final Touches
Now fix cells, pushbutton and led according to the pincture above and make sure it fits in the erasers original case.
Step 5: Assembly Time!
Insert the eraser back into the cover and also close it by adding the front part of eraser as shown in the picture above.
Step 6: Now Enjoy!
Use it to write secret message to your friends at school or cheat in class tests by writing on your hands, clothes or your arms.Just open it up by pulling out the front eraser part and push the button to see your secret message.
Whatever you do just don't get caught and be creative.
Share this instructable with your friends and loved one's.
This is an entry in the
Pocket Sized Contest