Some people dislike this but put a toilet plunger upside down on a tee.
Put a big ball on tee, beach ball if you need to. If she hits it off 3 out of 4 times, change beach ball for slightly smaller ball. Misses 2 out of 4 move up a ball size. You get the idea, you can make your own rules up. If she is successful move down a ball size, unsuccessfully move up a ball size.
DD's old pitching coach could hit the 12" ball at will from 43'.
We tried this today, but didn't have a beach ball. She was so determined to try we used a soccer ball. She loved the challenge.