many other children's games, that do not themselves involve singing are prefaced by a song. traditionally there were many calling rhymes, used to assemble players of a game, which is probably the origin of the nursery rhyme "girls and boys come out to play". singing games are often used as counting out or 'dipping' games, a means of starting a game by choosing special roles, usually by eliminating all but one player, most famously in rhymes like "eeny, meeny, miny, moe" and "one potato, two potato".