One of my biggest concerns nearing the end of this pregnancy was Caleb and how he would adjust to having a sibling. I know it's normal, and I know kids become siblings every day, but I wanted the transition to be a smooth one. So we have did a few things to prepare Caleb and make sure he understood what was going on in his world.
The Big Introduction
Babies come on their own terms, so we had a Plan A, Plan B, and Plan C. We had mapped out who was going to be staying with Caleb at our home (which was really important to me so that his routine wasn't too disrupted), and how the daily routines would function. Since I was induced, we at least ended up knowing which day she would come and we were able to really prepare for that. We wanted to be sure that when Caleb came to meet her, it was just Eddie, Caleb, Chloe and I in the room (and our photographer, of course). It ended up working out where he was the first person to come in from the waiting room to meet her. Once they said visitors could come in, Eddie went to get him from the waiting room and walked in with him. He came in with the gift he had picked out for her and opened it up right away. We let him look at her and touch her feet. He wanted to carry her right away. We also had gifts for him from his sister.
And honestly, it was love at first sight. He was enthralled with her. So much so that he didn't want to leave the room. Our family members rotated in, but Caleb stayed with Chloe and I the whole time. Every single person who walked in, he introduced them to her, "This is my baby sister Chloe!" He went to school the following day armed with a photo of his baby sister and showed it off to everyone at school. I couldn't have hoped for a better reaction.
I can't tell you for sure which of the things we did to prepare Caleb to be a big brother really worked, or if he would have been as sweet with her if we hadn't done any of these things (it's very possible - because he has always been very sweet to babies in general). But I do know we talked a lot about his baby sister and about him being a big helper. And honestly, I think kids just want to be prepared, as much as we do. It's a life-altering event for them, too.
And then there were four.
I hope these help you in preparing your toddler to be a big brother or sister!