Being a High Schooler myself, it is actually really cool to see viral effects first hand. For example, when I released my first simple game app, Runbow, I thought it might catch on if I just played it in class. It did, within a day, 1/3 of the students at my school had it (school of 2000). I was also featured in the school newspaper. It was a fun experience. I wrote a blog post about it:
That reminds me of my high school days where people played games on TI-83 calculators. I built a level for the Super Mario game and it spread like wildfire throughout the school.
http://blog.sam.ink/2014/03/05/i-made-an-app/