One of the most popular video games amongst kids is about tinkering, exploration and building cool stuff.
It's better than Candy Crush (no overt addicting psychological tricks) but ultimately the same kind of waste of time.
No child ever grew up and said "gee, how great it is that I spent 10000 hours in Minecraft instead of doing sports or learning a useful skill".
I grew up on video games myself; trust me, it sucks.