They are going to make their own fun

Your cat will try to hunt to make their own kind of fun and you need to provide them with interactive toys to train their natural instincts. 

“No matter how many expensive toys that you buy them, [cats] would rather play with your shoe laces, the box that the toy came in,” says Corsun. “They will chase bugs and mice. They won’t necessarily play with the things that you want them to play with. They’re going to make their own fun.”