SUBREDDIT: r/AskReddit
TITLE: What are some mediocre things you did as a child, to impress your peers, that made you feel like hot s**t?
POST: In fifth grade I was setting alone in the back of the room and I "programmed"  a green screen'd Apple IIa to print to the screen "Hello world!" which got the attention of a couple of class mates, then I made it  ask questions and respond to the inputs using the names of the classmates with vulgarities of course, and that drew more people and by the time I had that thing beeping continuously on a loop and playing music I was center stage to the entire class room and felt like "KING OF THE WORLD!" and the teacher was not so impressed, thought  I broke the machine.

Eventually got a whole bunch o' laughs when a typo returned the response "Syntax Error" which, apprently was a reference to a feminine hygiene product. (wtf? kidz right?)
TL;DR: 
demonstrated my "hacking" skillz at a tender age and impressed the class, king of the world and all that jazz, how 'bout you?