Okay so the problem is compounded by the fact that she is apparently not hungry.
Demonstrate the ball.
All the treats fall out.
Oops, now it won't work if she tries it.
Refill the ball.
Demonstrate the ball.
Oops, need to refill.
She wanders off.
She watches me play with the laser pointer.
She demands pets.
She watches the laser pointer some more.
And then she walks straight to the ball, pushes it with her paw, and EATS THE TREATS THAT FALL OUT