Here is a pair of cat ears you can wear and control when you want. You get 8 action sequences to share your emotions with others through your ears. Twitchy Kitty Cat Ears allow you to let the world know when you are happy, relaxed, surprised, alert, and more.
You will need 3 x AA batteries to get started. The headband weighs only 4 oz. Costs under $30 at this time.