Kassy got a nice looking marionette doll from her parents. The very relistic, ultra humanlike doll is very interesting. All of it's limbs move like actual human limbs. The invisible virest make it possible for you to do any movement possible with it. Kassy igives it a try, however she is far from being a professional, so some of her moves are a bit stiff.
As she tries more and more activities she starts to see more into this doll. She feels like it's a real person. So she gives her a personality by giving it voice and a backstory (only in her head).