My kitten Rambo is about 6 months old and she randomly started playing fetch when I threw paper balls for her. That's her favourite toy by far..... but yeah, she will 9/10 times bring the paper ball back to me in her mouth. Very cute!
check it out
Here's my buddy's cat that I am looking after, her name is Rambo and she was rescued from the SPCA. She easily one of the most hyper active (but affectionate) kittens I've ever come across.
Anyway, here she is doing what she does.