In the late 1950s Sullivan turned to sculpture as an accessible art form to practise while raising four children, and rapidly became known as one of Quebec’s most important modern sculptors. In 1966 she was commissioned to create a monumental sculpture for the Expo ‘67 site. The sculpture is surprisingly playful. It’s title is drawn from Lewis Carroll’s Through the Looking-Glass and What Alice Found There (1871) and it is intended to represent an expression of joy.