I did remember to get buttons last week, but it took two visits. I'd forgotten each boot needed two buttons! Thankfully, I have a very helpful son, and he went back the next day to get extra supplies.
Saturday afternoon was a marathon of button sewing. Seeing the finished product, I've decided I like the small button boots, but not so keen on the adult size. I'm going to do the adult size in fisherman's rib, and see if I like that better.
After sewing on the buttons, I had another pair of slippers to sew up.