Kim, J does this sometimes too, but luckily not as often as your DD. And he only drinks milk and water so I don't have to worry too much about stains. I think it is attention seeking behaviour, as he usually does it when I am not paying attention too. I find that if I sit with him at the table while he is drinking (or on the couch if it's water outside of meal times) then he doesn't do it. It is hard with two kids to always be able to do that, but it does stop the behaviour! GL.