I have been sorting out some boxes of stuff left over from my production studio and found a few things that you can create with;
Cast from clay and fired to temperature some are terracotta, others porcelain or ceramics
Some are in very limited supply.
Since these are already fired clay pieces they can be painted with ceramic or china paints and fired again.
You may also paint these with acrylic paints or chalks and then spray with a matte or gloss sealer