Folk Song Lab uses interactive group sessions to explore different ways by which improvisation stimulates an attitude towards the song by which it is understood as a cognitive framework that is recreated by the singer in the performance moment. It takes its point of origin in certain conceptual qualities found in traditional folk song and improvisation, stimulated using flow-inducing concepts (Csikszentmihalyi 1990. Flow: The Psychology of Optimal Experience. New York: Harper Collins.) such as risk, mimicry, play and reorientation, and interpreted in musical terms and without written instructions. This empirical study uses particular developed improvisational methods reflecting traditional songs’ cognitive frames. The project raises questions regarding the influence of time in relation to how creativity and flow appear during improvising sessions. Some of the methods explored in the project, such as mirror singing, might be related to neuroscientific findings regarding the function of mirror-neurons, hence reflecting the possibilities for conceiving of human creativity in a collective way.