@Sevensilverrings, for sandtray therapy, figures such as the one in the picture, any human figure expressing emotion, also symbols, such as love (heart), death (skull), anger (volcano), etc etc. Sets of families. Human figures with an animal head (e.g. an adult figure with the head of a dragon), a human figure with a face on each side of the head expressing something totally different (double faced), etc etc.
For the palettes, for me it's got to be something like these:
mymodernmet.com/ceramic-paint-palettes-tramai-ceramics/