<human>: Can you condense the text into three sentences or less?

I'm a bridesmaid at one of my best friend's wedding one month from tomorrow. Three of the other bridesmaids and I have all known each other and the bride for 15+ years, and she and her groom are finally tying the knot after 12 years. The MOH and I have expressed the desire to conspire a surprise for them, but we suck at coming up with ideas! We're all pretty scattered around and have fairly busy schedules, so we only see/talk to each other maybe a couple of times a month (if that), so it's been a couple of weeks since we first mentioned doing something.

We originally thought of doing something on the wedding day that could be cute, but nothing that would spoil or steal the spotlight from them. Just something to show them how much we love and appreciate being a part of their lives and how happy we are for them!

I also remember seeing someone mention here how the bridesmaids each sent a message to the bride in the days leading up to the wedding, one day for each year the bride & groom had been together. I'd love something like that too, and it might be a little more discreet than a display on the actual day. This could also help them lighten up a little from the most stressful time before the wedding (although they're very down-to-earth, stress-free people, but it would still be nice).
<bot>: Looking for some cute, simple ideas for a surprise from the bridal party for a bride & groom who have been together for 12 years to show our love and appreciation, and most of all to honor them!