I think my daughter was about 19 months when we found out that we were pregnant with our son. I did acouple of things, one was to get her some kids books were characters got new baby sisters or brothers. Her favorite was the Critters book, I think it was called A New Baby....can't remember now. But it helped her to understand that mommy and daddy would be bringing home a little brother or sister soon. I also bought her a Care For Me Baby Pooh. It came with clothing (diaper, shirt and hat)a bottle, a seat to feed him in that doubled as a bath tub, a towel and baby Pooh of course. We would sit in the bathroom or kitchen and bathe pooh, dress him and then feed him. All the while I talked about how her new little brother or sister would need just as much help, love and attention as baby Pooh. Once we new that we were having a little boy, we talked about baby Isaac, instead of baby Pooh. I also encouraged her to talk to my tummy, she would crawl up on my lap, hug my stomack and say, I love you Isaac. I have also heard of people buying small gifts and then giving them to the older sibling and saying that it was from their new little brother or sister. They did this during the pregnancy, the day of the birth and a few times after they brought the baby home. Once the baby is home, it is important to involve the older child as much as possible. My daughter would bring me the wipes, throw diapers away, help feed her brother and read stories and sing to him. She absolutly adored him, until he started to crawl that is, and then all of a sudden her toys became community toys....lol. Anyway hope something in here helped and good luck to you and your growing family :) M.