Another named loosely after Game of Thrones (one of the few all time great fantasy series, NOT filmed in this country).
The old gods of the children of the forest are nameless deities of stone and earth and tree, which were named so by the followers of the Seven ("new gods") that replaced them in all but the north of Westeros, where their religion is still practiced by northmen, crannogmen and free folk from beyond the Wall.
There are no priests, no holy texts, no songs of worship, and practically no rites that go with the worship of the old gods. It is a folk-religion, passed from generation to generation. The closest thing to a ritual we have seen is prayer before the heart tree in a godswood, holy groves contained within castles throughout the Seven Kingdoms, and often the only places where living weirwoods still remain until one goes north of the Wall. It is said that the sigh of the wind and the rustle of leaves are the old gods speaking back to worshippers. The children of the forest believe that the weirwood trees were the gods and when they die they become part of the godhood.