So after many starts and changes of mind I finally decided (as I was still in 'heart mode') to add hearts to the lids.
Then came the 'thread hunt'. I searched high and low for the 'right one' and in the end I used a number 40 variegated Lizbeth that somehow came home with me from America a few years ago!!! Thank goodness it did as it's 'just right'. I added a Madeira thread as a filament and to give it a bit of sparkle too. I sewed the hearts onto a piece of fabric and then the inner part of the edging. Then I used the same thread (invisible thread) to sew the outer part of the edging onto the edge of the box lids. This has made the top sort of 'blend' into the original fabric. I'm really pleased with them although they were VERY time consuming on the sewing front!!!
Next decision is what on this planet am I going to do with them? I don't want them - they're of no interest now they're finished so I'm going to give this some thought.
Anyway, enough rambling - here they are 'transformed' hopefully for the better!