DD1 is mostly a lovely girl who can be extremely kind but she always seems to want what her sister has. She is 4.75 and I guess she's always had this tendency but over the last 6 months it's got so bad that the first thing she looks at is DD2's plate if I put 2 plates of pudding in front of them, to say "I want that". DD2 is only 18 months younger so she can't possibly remember always having had everything and it doesn't appear to be a ploy to get my attention. As far as possible I have always given them the same (attention, food, toys), but her main aim in life at present seems to be to get DD2's toys from her, to convince DD2 to say she can always keep them and not to give anything in return. Until recently DD2 would always give her anything she wanted despite my frequent intervention saying she didn't have to, but recently she is less inclined to hand over her best Barbie etc. I even find DD2's toys stuffed down the back of DD1's wardrobe. Can anyone suggest anything I could try please?