We never use our hands to play with her. She'll be playing, then just turn to us, tackle and bite. Does she maybe get bored with the toys on a string and want to go after larger prey!? We've tried to stay still, say NO!, put her in a different room, walk away (we can't do that, she'll follow and tackle as long as you walk!) She'll be more calm, and rest by us more often, but her play is getting much more intense as well, you'd think one would increase while the other decreases, is that the norm for kittens?