TOPEKA, Kan. (AP) — Jennifer Malcolm's popular Etsy business evolved out of her desire to break a bad habit, and because of a back injury.

A couple of years ago, she was down with an injured back and bored. Looking for things to do, she delved into her early education background to make some dough — think of it as Play-Doh for adults — because she was biting her fingernails. Anxiety has always been a challenge for her, she said.

"I would find that when I had the dough, I wouldn't mess with my fingernails as much," Malcolm said.

She played with a dough recipe over a five- to six-month time peri...