Is he interested in his little sister at all? My daughter is 10 weeks (my son is 20 months) and I have him help me a lot to keep him occupied while I’m occupied with her. I try to be super enthusiastic and make it fun. Have him bring you her diapers and wipes, talk to him about her, tell him what she’s doing, point out her little body parts and show him that he’s the same! (He thinks it’s hilarious that she has “smelly toes” too lol) I think a big thing with kids at this time is making them feel equal and know that you haven’t forgotten about them at all. Make them feel included so it’s fun for them! I think they get a little reckless at first because they’re jealous and want the attention they used to have and that’s totally normal. Like you said it’s a huge change! So just keeping them included and showing them that there’s plenty of love for everyone is super important! Even though my daughter is still so little, her and my son are already best friends. You can see how much they love each other! It’s truly the best! Good luck!

I’m going through the same, I tell him to bring me his books to read because he loves books and I read it to him, I put on cartoons, I sit with him and his toys. But sometimes it’s so frustrating because all he wants to do is climb everything and he knows I don’t want him doing it so he does it for attention

I need tips too, my daughter is having so many meltdowns as my 12 week old needs to be held ALOT 😣

I put toys out and nurse on the floor so I’m sat with my daughter whilst she plays :)