At the end I decided to make tiny houses kechain charms with little doors and windows made of felt and freehand machine embroidery. I have a lot of leftover fabric, patches too small to make anything other than very small objects and this seemed like a perfect solution. I attached a split ring to the "chimney" of each house and am quite pleased with the three I made today (once I knew what I wanted they didn't took too long to finish).
I might try some hand stitching next time or add beads and trims to make the houses more festive - they are all stuffed with plant fibre filling so can also be used as pincushions or even christmas ornaments...