My DD has recently (in the last couple of weeks) started hitting herself in the face or on the head. She uses anything from her hands, to the remote control or one of her hard toys (usually a stick used to play a toy instrument). She hits quite hard and there is an audible 'clunk'. She always looks a bit confused afterwards, as if to say 'What was that for ?', but she never gets upset by it. She is quite verbal and we generally know what she is 'asking' for. There seems to be no pattern, she doesn't do it when hungry or tired for instance. We spent Sunday over at a frends house and DD just started hitting herself at the dinner table (6 other couples, excluding DH & I). Everyone else seemed to think it was funny but I'm really starting to worry. Please tell me it's a phase that they grow out of ?