nailed it. it's just virtual legos. it's a way to kill time or just have fun puttering around.
but this is a message board where people spend hours a day arguing about why this dude in a thong should have gotten a plastic trophy over that other dude in a thong. who's wasting their time again?
legoes are super expensive these days, so yeah, it's like an unlimited lego kit... where kids can fly, interact with animals, etc.
The "mods" are amazing. The things people come up with, just limitless.