The aim of the present study was to achieve, using an affect theory approach (Tomkins, 1962; 1963; 1991), a deeper theoretical understanding of the psychological significance of hospital clowns´work in caring for ailing children viewed from a care-giver perspective. The methodological approach was qualitative and based on 20 interviews with healthcare staff: 3 men and 17 women. The result showed how the staff emphasized a psychological quality of care alongside the physical quality of care. The hospital clowns´"unexpected possibility" provided a safe area for recovery, for both the childrren and the staff. The theoretical interpretation showed the presence of the affects surprise/startle, interest/excitement, and enjoyment/joy, as well as specifically how "joy without demands" often had a lingering effects in the form of vitality. Joy without demands is discussed in relation to psychological theory with emphasis on: a confirmation of the body´s possibilities, a magical attachment, a chance to transcend boundaries, and a non-demanding situation.