Hi, so my daughter was an only child for 6 years until my son was born. I always thought to honor her at his birthday with a big sister anniversary cake, or something like that as she's much older (she'll be 7) and he wont remember this, but she will. We are having family and friends over for his 1st and the party is for him, however, i'm thinking to do something to congratulate her on 1st year of being a big sister? B/c of the large age gap, and she understands, etc....anyone else doing this or have ideas for this thought? Thanks!