Take the ball out or wrap the ball in tape or put little pieces of tape on the ball.

Turn her speakers all the way up, open a program and make it come up with a pop up window or a warning window. But before that move the program off the screen then move the warning off the screen so where ever she clicks it will be that noise.

Or turn sticky keys on, rotate the window, if you're on Macs invert the screen or zoom in.