Telling my son he's going to be a big brother.... I need help


My son is almost 7 and has been wanting to be a big brother for years. 2 years back we told him I was pregnant but sadly we misscarriaged and he was super sad that there was no baby. After 5 misscarriages I'm pregnant again and am 12 weeks. I hope to tell him next month but need ideas. I bought a tshirt that says Big Brothersaurus since he loves dinosaurs. I've though about a book but haven't found one for his reading level. He's a 2nd/3rd grade level.

Please help me... I want it to be super super special. 😍😘🥰

Thank you