It is String Hearts for "Block Lotto"!
One of my "Bloggy Friends" mentioned she was making some string hearts for her Block Lotto group... and it looked like so much fun, I emailed Sophie to see if I could join their group. I thought one or two blocks a month until I manage to finish Kaylin's quilt would be do-able. These heart blocks are a bit addicting, though. Very quick to make and really good stash busters. All those little bits that are too narrow for the strip bins, but too big to throw out... what a good way to use them! This one is my first (and the one I like least - the strings are too wide and the colors need to be brighter).