At 12 wks, a puppy should be playful
If you're looking for a yorkie in OH, try
www.stellaryorkies.com She's a member of YT. She's a wonderful breeder and she takes great care of her adult yorkies and pups. She does testing on her adults before breeding to make sure they are free of genetic diseases/defects and she tests her pups before she places them. She also breeds beautiful Biewers
Also, when looking for a puppy, make sure that the breeder offers at least a 1yr health guarantee for genetic diseases/defects.
That's so wonderful that your mom is looking for a yorkie pup to love!! Good luck!