Oh, so fun! I love announcement ideas!
I was away on a work trip when I got my BFP. I knew it was a possiblity, so I brought a shirt with me (that I had bought when we tried a few months ago) that said "I can't keep calm, I'm going to be a mommy" I wore the shirt on the airplane home and when DH picked me up, I asked him if he liked my shirt! And *lol* before he looked, he definitely gave me the husband "yes, of course I like your shirt" but then he really looked at it ^_^
I'm not sure how we're going to tell our parents, but I do have plans for our big announcement and for my sister and two friends. I got my sister and two good friends some tumblers that say "Only the best sisters/friends get promoted to auntie". I'm going to mail them each their tumbler, without telling them anything, so they can get them and be completely surprised!
And for our big announcement after the first trimester is over, I want to take a shoe picture. DH and I both wore converse at our wedding, so I want to get a picture with our wedding shoes and the baby converse I have. I've been planning it for ages, since we started talking about ttc, and I'm super excited