My cat Fluffy loves the iPad app called CatPad. He can chase it for up to an hour without getting bored and then the movement of the mouse seems to lull him into sleep because he nods off with his head on the iPad. His claws do not do anything to the screen (I don’t have a film protection sheet on it). He likes this one the best as it makes little scuttling noises and squeaks when he hits it. Find it here.