Those are such cute suggestions!!
With us, I couldn't keep it inside to do something really cute for DH so I told him on the way home from work. (We carpool together) We'd taken a pg test the Saturday before, and it had a very faint line. I just couldn't believe it. I took another test Sunday and again didn't believe it was a possibility. When I shared those tests with a few of my JM girls here, they convinced me it was real so I tested at lunchtime at work on Monday. That evening I just couldn't keep it inside so told DH then.
We did tell his brother & SIL in a cute way though. We made a shirt (did an iron on transfer) for their daughter (who had turned 2) that had Elmo holding a sign saying I'm going to be a big cousin. Here's a pic, it's a bit blurry as she was so happy showing off her Elmo shirt. She's a big Elmo fan.