The ouroboros is traditionally depicted as a serpent or dragon in the process of swallowing its own tail, resulting in the formation of a circle. Unsurprisingly the ouroboros is most often regarded as.
DIY: How to make a cloud! Wish I had know this when Nadja asked for a cloud for Xmas, we only came up with a dry ice version. She still has a jar of "condensed" cloud though. The cloud can be suspended from ceiling with light behind