If you are after some authentic texts in German for the World cup look no further than some of the many German sites geared towards children. One of these is Hanisauland produced by the Bundeszentrale für politische Bildung. The screenshot shows their home page for everything to do with the World cup. On these pages you can find information about all the countries playing, including geography and climate, together with images and a clip of the relevant national anthem.
Another useful site is ZDFtivi which not only has a blog about the world cup but also more general information about the countries of Africa. There is also a video about a young girl living in Senegal and one about a boy from Mali who aspires to be a professional footballer. There are also some interesting materials and video footage about the “Big five” in South Africa which could be useful for some CLIL.