I mostly mindlessly watched Minecraft youtube videos, lets play videos, and would occasionally play some mobile game.
Pros: - Developed my vocabulary by listening to adult conversation (commentators) - Became adept with technology by getting familiarity with navigating the internet and jailbreaking the devices - Became a fast typer - Was able to easily make friends who watched similar YouTubers
Cons: - Difficulty focusing - Became impulsive as having instant access to technology is a form of instant gratification that was drilled into me - Learned every swear at 6 years old - Discovered porn at 7 years old
Regardless, I do think I turned out fine. I was a straight-A student throughout my entire K-12 education, made plenty friends, and have maintained an ambitious outlook on my career.