T.B.
My son was a little younger than yours when his sister was born, but we made sure he got one on one time with both parents every day. Most of the time with mom it was just playing candyland while sister napped, or reading extra books together before bed. With dad, it was lots of cuddling in the evenings and some extra rough-housing too. We really went overboard with the positive attention, and anytime he helped out with sister (without being asked) or was gentle with her we doled out the praise and sometimes even a special treat like ice cream. We also tried hard not to ask him to do things for her (like going and getting stuff etc). During the day when it was just mom and the kids, I would try to get him set up with an activity (coloring, play dough, or something he doesn't get to do all the time) before sitting down to nurse or bathe or put to sleep etc. Lucky for us little sister was pretty good natured and pretty content to just hang out too, so we were even able to play outside with sister in a bouncy seat just watching. As much as possible I tried to give him my full attention (much to the demise of my house). It seemed to work well for us. Things got much easier when she started walking, then he felt he really could play with her. We do have a special place that big brother can play with certain toys too that aren't sister appropriate, or with things that he doesn't want her messing up. We found that helped with his aggressiveness to her, since it mostly came out when she interrupted something he was playing with. My daughter is now almost 2 and my son and her play together really well, and he is fiercely protective of her. (He doesn't even like it when I put her in time out). Oh yeah, we also make sure at dinner each night we ask him about his day, even though I know everything he did that day since I spend the whole day with him:) We ask questions and engage him in conversation for much of the meal so he feels important. (Also gives him opportunity to discuss something if he is upset etc.) Hope this helps.