So my son (7 y.o.) lost one of the two ropes on his drawstring bag. No big deal. I told him I would fix it after dinner. He did not want to wait, so he says he will fix it himself. While I admire his determination, I had low expectations. Well, he managed to undo one of the knots and re-route the string to the other side, and run is through the fold on the bottom of the bag. The only part he could
not do, is tie the string in a loop around that fold.
The string is is soft and slippery, and the bag will be carried and tossed around a lot. The knot I would prefer for this is the water knot (abok 296) loop, for its ability to remained tied under those conditions. I have used it to attach accessories on a backpack that I carried every day for years. It it never came undone or needed tightening. The problem is, that knot requires an overhand prior to running the string in the fold. It was already through the fold, sans overhand, and I did not want to undo any of my son's work. So, I tied a Chinese crown knot (abok 1066). I know that this knot cannot hold a lot of load, but it is more than sufficient for the task. Dressed tightly, I hope it will remained tied. My son also appreciated how nice the knot looks.

The finished loop through the fold is slightly down and right from the center of the image.

What would you have tied?