She is laid in bed under a blanket and I tied her bare feet with rope and tied her toes. Her soft wrinkled soles are fully exposed to tickle . Feather is good for beginning but another side of feather is much worse for her soles. I have to tickle her with my fingers just to feel her soft soles. I have to use a washing brush to tickle her and of course her nightmare, electric toothbrush. Maybe a more powerful tool against her bare soles is a hairbrush which makes a big agony for her.