In 2005, the first production of HELIOS Theater for the very young premiered: "Earth, Stick and Stone". Even before that, HELIOS Theater was already intensively dealing with questions around the theatre for the youngest audiences. It organized international festivals and symposia with a focus on the theatre for the very young. Since 2006, it has been partner in international research and exchange projects like the "small size" projects and, since 2018, MAPPING".
From 2014 on, Barbara Kölling was regularly invited to hold mentoring projects for young theatre makers in India and South Africa, focussing on the theatre for the youngest audiences.