I wonder how outdated/lagging these studies are. When I was a kid I was reading nearly every waking moment between say 3rd grade and 9th because It was the only form of entertainment I had (until I got a computer). That is because my parents thought that TV rotted a child's brain and didn't have one in the house until after I left. Today, my kids read, but they have phones, TV's, computers, and a ton of other distrac…
As a result we read a lot of books. I also spent a lot of time playing with things like Lego and as I got older I was into Meccano and building Model aircraft/cars etc.
Eventually I got into Computers. In my mid teens I bought a second hand computer (a 386) from street market. It wasn't working so I read up on how it all worked tracked down spare parts etc and once I got it booting I spent hours everyday on the thing.