I have DD1 (3 yrs) and DD2 (1 yr). DD1 is really struggling coming to terms with having to share with her baby sister. She will not let her baby sister have anything and takes toys from her (DD2 screams!). She also wants to go on anything I put the baby on ie. swing, slide etc. I try to spend as much time as I can doing "big girl" playing, especially when the baby has her two hour nap but the minute she wakes up, it all kicks off again. Any thoughts....