Rowan's shoelaces have been a constant thorn in our sides. He can tie, but he's not very good at it and they're always loose. So they always come undone. This wouldn't be so bad, but he doesn't care if they're undone so they're always flopping around and getting ripped up. I had an idea to fix it. One piece of elastic, thread it through, and sew the ends together. Sha-zam. Done. Issue solved. It's been a week and they're holding up just fine.