Well I found these tiny stuffed baby toys I picked up a garage sale. One is a little Tigger, I thought his legs would be easy to catch.
It bounced off her a few times & she finally started trying to grab it so I praised like crazy. Then she started catching it! We tried it for about 15 minutes & in that time she ate a whole stick of skim string cheese cut into tiny pieces.

With more practice I'll try to add her mini Kong balls to make fetch more fun.
Thanks everyone, I'm so glad it's a learned thing that some like, & not a "skill" she's missing.
These yorkies are so dang smart when
they want to learn something.