Artificial intelligent assistant

jackstone

ˈjack-stone, ˈjackstone
  [A variant of checkstone; perh. associated with jack v.1]
  A small round pebble or stone; esp., in pl., a set of pebbles tossed up and caught in the game of dibs.

1814 Brackenridge Jrnl. Voy. Missouri in Views Louisiana 251 The women..amuse themselves with a game something like jack-stones: five pebbles are tossed up in a small basket, with which they endeavor to catch them again as they fall. 1885 Truth 28 May 853/1 She had a passion for gathering jack-stones and forming mosaics with them in the garden.

Oxford English Dictionary

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