For the brooches I cut a piece of Bond-a-web in the heart shape too.

When everything was stitched in place like in the photo above, I turned the felt face down, tucked the ribbon ends in, placed the bond-a-web on top then placed the second felt heart on top.

Sadly I missed photographing this stage but basically you are making a bond-a-web or interfacing sandwich with the ribbon and lace ends tucked in.

Give it a quick press with the iron to seal it all together.

Ironing felt is horrible, it goes all floppy and a bit fluffy. Don't panic, just let it cool then trim any untoward bits. As it cools it should have a bit more body to it. If you want a really firm brooch just use a thicker interfacing.