My two boys “threaded” the hearts, and they got 18 hearts each–9 black, 9 pink. I ended up cutting out all of the hearts since it’s too hard for kids to do with felt. Grab some ric-rac, some contrast ribbon, and some safety pins.
Line up the hearts, with a small gap between each one. Line your ribbon up the same length, but cut about 8 total inches longer, or at least long enough to tie off the ends.
Cut about 1/2″ slits. Do this on each heart, so two slits on each heart. It actually goes really fast.
Pin two ribbons together. Make sure you tie a knot at the end so your kids don’t slip the hearts off.
They had a blast and kept telling me what a great craft it was.