Craftster is sponsoring a “Sun in Gemini” craft challenge over at tarot.com.

embrace both the curious and dual nature of the Geminis, and channel that energy to create a pair of something – they can be literal pairs, such as handcrafted bookends or earrings, or an abstract image or artwork that symbolizes pairs, like a photograph of night and day.

This is a neat inspiration for some sort of “duality” project. There doesn’t appear to be any restrictions on medium or method, so there are all kinds of options.