Need help surprising family with pregnancy announcement

My 30th bday is later this month. I was planning on telling the people closest to me on my bday about the pregnancy I will be around 9/10 weeks then. Any suggestions ? My bf has a son but this is my first biological child. I am my mothers only child but she raised my god sister and sees her children as her grandchildren

I know my mom will be super happy. So I really need a cool idea I plan on doing a family dinner the day before my bday at a restaurant. Any suggestions. A wine glass, a pin, a shirt, a game. Any suggestions ???!!!