Three projects are presented in the light of citizen science and archaeology, each in their own way involving volunteers with an ambitious scientific and dissemination agenda. All three projects have an interdisciplinary approach and emphasize involvement and co-creation with participants in the development process. Additionally, we consider opportunities and challenges in citizen science with respect to interdisciplinary projects in general as well as specifically in archaeology. The perspective for future citizen science projects in archaeology and in other interdisciplinary contexts are discussed.