J.M.
My daughter does this now. Especially when she is tired. As other moms have suggested, I hold her hands firmly BUT I like the possitive spin "Be Gentle" And then I pat or rub my face with her hand to show gentle. If she does it again I say be gentle and put her away from me. It usually really upsets her that I will put her down and not pick her back up for a bit. I think its partially an attention getter and I dont let her have attention for hitting. So far this has worked very well so that she only trys it occationally when she is over tired or over stimulated. Good Luck, It will pass. Jen