Hofmann, Eva-Maria / Rodloff, Susanne:
Gespielt wird auf der ganzen Welt
Kallmeyersche Verlagsbuchhandlung GmbH Seelze 2002
A collection of more and less well-known games for children. Various versions of these games exist all over the world. Over half of them are "active" games.

Umminger, Walter:
Sport Chronik - 5000 Jahre Sportgeschichte
Sport Verlag Berlin 2000
Almost 800 exiting pages about the origins and the history of sports. Concise, easy to understand, richly illustrated - a treasury of information and ideas for international activities and projects with children.