We told our 3 year old as soon as we knew. He got right into it straight away. We’d already started talking about how babies are made, but we had to have many iterations of this conversation.
Lots of library books in this topic was really helpful.
As I’m coming up to my due date (I’m around 34 weeks) we have lots of chats about what will happen when I go into labour (ie who will stay with him, who might need to pick him up from school, how long I might be in hospital, whether he can visit) and what will happen when I come home.
I have an EXTREMELY curious child and we’re very open and matter-of-fact about all things biological, so we’ve discussed the two options for hope the baby comes out, which way my son came out, what this might mean for how much I can lift him and play on the floor, etc. He eventually wanted to see a video of a birth which we started by showing puppies and then a human and he was very interested in these videos. We also showed him a c-section (I want a vaginal delivery like I had with him, but I’ve got complications so this is increasingly unlikely), and he thought it was fascinating.
We’ve also talked about what his role will be, how he can help, how sometimes he might need to wait for something, but that sometimes his baby brother might need to wait for something while we help him.
We let him make a few small decisions (like when we got the baby capsule put back in the car, he got to decide whether this seat got moved or stayed where it was), what the baby will wear to come home, and what our first outing could be. This has been really helpful because he is totally feeling like he is part of the decision making.
I developed gestational diabetes and made him responsible for reminding me to take insulin and getting to prick my finger (if he wants to) to do the blood glucose monitoring. I explained we did this for him too, which made it more relevant I think.
He’s very very excited and kisses the belly lots and sings and to talks to “his baby”. I know there will be moments of frustration and jealousy from him… That is inevitable I think, but I’m pretty hopeful that so far, he’s viewing this as an awesome thing that he I firmly in the centre of along with us.