Eraser Prank
If you want to have a little fun with your friends follow me.
What You Need
To do this prank you need a mechanical pen.
And also you need your friend's eraser; you can borrow it.
And also you need your friend's eraser; you can borrow it.
One Easy Step
Embed the lead of your mechanical pen into the eraser corners.
What Will Happens
Now when your friend is going to erase paper with eraser, he/she can't erase it clearly.