Born in the late 70s, I only recall being bored when my parents made me go to mass, or waiting while they did adult stuff like going to the bank.
Horsing around with my brother or playing with the Casio stopwatch kept us sane.
At home it was TV, Legos, music and bikes
I know, not the same, but I built my kid a cheap “Gaming” laptop from an old corporate PC that was going to be scrapped because it restarted every hour of use.
Cleaned the cooling fins and fan, repasted both cpu and gpu, got a cheap ssd and extra sodimm of ram. Was good for about a year or so until he got my Ryzen rig :)
A typical hamburger is about 500 kcal so you would have to go up those stairs 100 times to burn it off in theory.
But science is now saying that burning off calories isn’t related to excersise… you burn the same amount doing or not doing physical activity. So I don’t know if this is relevant anymore.