Help!!!

Today is my so and I wedding anniversary. We're going to be doing anything today because there is a lot going on. But I wanted to surprise him in some fun creative way that I am pregnant. (Our first daughter announcement I was young and we cried more than anything-she's a blessing) I only want 2 kids so I wanted to make this as memorable announcement as possible. I'm thinking of some sort of scavenger hunt but idk.. Plz ideas!! He gets home from work in 5hrs.