Here is a burp cloth that I crocheted an edge on. I did a picot edge. Nice and quick. I bought the flannel hemstitched with the holes already in place.
Here's a burp cloth I made for my baby boy. I sewed the two pieces of flannel together and thought I'd just poke the small crochet hook through and crochet the edge but with the seams, it was too thick. So, I just have a plain burp cloth. I bought five yards of this airplane flannel years ago with the hopes of using it for a boy someday. I think I'll use it to make a quilt for his next bedroom when he outgrows the nursery.