This is by far the easiest DIY project I have done so far. Even if you're not familiar with iron-on transfers, you should be just fine! All you do is find some cute bikini bottoms, purchase the iron-on sequins, iron on and VOILA! I also purchased some iron-on letters and will make "Mrs. Daneault" for the day after wedding, my fi will totally love it!
I purchased my black bikini bottoms from Wal-Mart for less than $5 each and the iron-on transfers were from Hobby Lobby and were $2.50. So this project cost me $7.50 for each of my girls. I think they will totally love them and will make for such a cute picture!
Just make sure you use the delicate setting on your iron with NO steam. The tags on the bathing suits said you're not supposed to iron them, but I figured for the price it was worth to try it and I had no issues!