The organic, circular forms of the mobile here make it an excellent way to highlight air currents, and it’s well positioned to catch drafts from the windows or the heating and air conditioning system. The shape also has a soothing effect.
Mark the passage of time. This play of light & shade brings about a consciousness not only of the gentle air movement between two doors, but also to the passage of time during the day and the seasonal variations.

They support the homeowners’ mental well-being because they subconsciously make it clear that neither time, nor the air in the home, is standing still. It makes the experience of the same space varied.