You have to make the mouse 'come alive' for your cat. Tie a string to the end of the mouse's tail and pull it around the house. Swing it gently in the air and drag it down the steps. Schedule a time each day for interactive play , and try to find some interesting toys for your cat. You can swing these toys in the air and let your cat chase them.
Most experts recommend at least ten minutes once or twice a day.
Put the interactive toys away when you and your cat are finished playing, so your cat doesn't get bored with the toys. Never leave your cat alone with toys it can swallow, and don't give your cat toys with small parts it can choke on. A small fish tank will stimulate your cat mentally when you're not at home. If you don't want to buy a fish tank, place a bird feeder outside of a window to keep your cat occupied. If you have only one cat, consider adopting a second.