You can see a stroller in the background. I think the reason Korean grandmothers love becoming grandmothers is that they will soon get a handy cart to carry their stuff.
This was the end of a mere 2 hours of rice harvesting. I lifted and carted -in a bigger cart- perhaps two tons of rice. My brother- and father -in-law don’t seem so tired. I guess driving the combine isn’t so tough as carrying the rice.
Honestly, they did work hard, and longer than I. Here, my father-in-law scythes the rice in a corner of the paddy. The combine can’t get into the corners so well, so they are done by hand.
Wikipedia has images and info on other combines which make this one look a little less ‘super':
My brother-in-law had gone off to play volleyball, so my father-in-law brought in a tractor to carry the last 12 bags. If you click to embiggen, you can see my son is getting a ride in the tractor’s scoop.