Kay Gardner (February 8, 1941 – August 28, 2002), also known as Cosmos Wonder-Child,[1] was an American musician, composer, author, and Dianic priestess known for using music for creative and healing purposes.

She was very active in promoting the work of contemporary female musicians and was a pioneering figure in women's music.

Between 1976 and 1984, Gardner worked on A Rainbow Path, a large musical composition designed for meditation on the eight energy centers, or chakras, of the human organism.

The Triple Goddess aspects of Maiden, Mother, and Crone are prominently featured, as are the four seasons and Neopagan holidays.

She is credited with envisioning the Acoustic Stage venue at the Michigan Womyn's Music Festival (with cellist Rachel Alexander), as well as founding and directing the Women With Wings sacred singing circle.