Mancala, a general term given to a variety of board games that make use of pits and pebbles for its counting oriented gameplay, is believed by some experts to have originated in ancient Egypt, though others claim the origin to be Central America. [Source] Whatever the origin, the game is very simple to learn and therefore just about anyone can play.
Mancala Snails is a cute Flash version of Mancala that uses snails as pebbles and drawn squares as pits. The graphics are quite pleasant to look at, and there are two different modes of play: single player against the computer, and multiplayer where two people can play by taking turns with the mouse. This particular game was produced by RocketSnail games—hence the Snails motif—and they even have a classic Mancala game available at their site for the purists out there.