M.L.
Put your hair in a ponytail if it can fit, or just remove her hand and put it on something else, like on a stuffed bear or something. My son does the same thing, and he is almost 3. She may like a silky thin blanket, when I was little, my mom gave me a cut square of a silky slip. She really just likes the methodical action, so giving her something else she can do that on may help.