It's a myth that going outside is a requirement for feline happiness. Playing regularly with a cat and providing them with entertaining toys can easily satisfy their stalking instinct, keep them stimulated and provide the exercise they need to stay healthy and happy. It also keeps local wildlife safe! Be certain they are always supervised when playing with new toys, and make sure that small parts don't present choking hazards. Cats can get easily bored, so change toy's often to keep them active and interested.