I need your help ladies!!! PLZ

Heather • 41 and 3 kids. Kids are 13, 10 and 5. One girl and two boys!
I had the NT scan and genetic testing done at 12 weeks and 2 days (high risk and 35+ with and abnormality at the NT scan)  today I am 13 weeks and 2 days and on Monday (13+6) the day after my wedding anniversary and my son's 4th birthday I find out gender. 98% sure it's a girl this is number three. Do you ladies have a new super cool or creative way to tell him as a big surprise for our anniversary? He has no idea I am finding out gender and I really want to surprise him!!! ❤️❤️🍼🍼🙏🏼🎉🎉☺️