How to announce to my brother?

October Momma • 22 year old happily married mother of boy girl twins, Emma and Alden, born 10/11/17😊
Has any one done a special announcement for their siblings? I want to tell them Monday after my ultrasound but I can't figure out how. We are super close and I thought about doing mugs but don't know if that will turn out alright. I'd love to see announcement ideas!