Found a similar calculator in Spanish class last hour. Entered a similar message for a laugh. "Hello, my name is Tom Riddle. I see that you have found my calculator, muggle. This will be harder to stab.
Why does everyone think Harry stole the lollipop ! He didn't if he did you would see his hand coming out of the invisibility cloak or the lollipop would have turned invisible ! IT GOT STUCK TO THE FREAKING CLOAK!