Big Sister Announcement

Hi all!! To cut a long story short, I've had 2 miscarriages and the first one we didn't find out until my 12 weeks scan that there was no heartbeat. My almost 5 year old (at the time) was with my husband and I at the scan so I felt awful. The 2nd miscarriage happened at about 7 weeks and we didn't disclose to my daughter that I was pregnant at all. She still mentions the baby now and she's 7 in January God bless her. Anyway, I'm almost 11 weeks pregnant and providing all is well at my 12 week scan, we want to announce to my little girl that she will be a big sister. I want to make it special for her as she's been asking for a brother or sister for a while now and has been really persistent recently (I definitely think she has a 6th sense because of some comments she has been making) to the point where she said she's going to ask Santa for one 😂🙈🎅 So anyway I was just wondering if anyone has any ideas what I can put together to make it special. I've thought of the usual big sis t-shirt and scan pic but that's as creative as I can come up with currently. I'd be grateful of any suggestions. Thanks in advance and sorry for the long post 😘 x x x