Also known as "The Little Goat Game".
This is considered the children's version of Um El Bagara, and it originated in Africa, in the area now known as the Sudan.
The board is a 2x3 mancala board, and 3 stones are placed in each of the six playing wells. Players take turns moving stones by picking up all the stones in a well then dropping a stone in each well until they run out, moving either clockwise or counter-clockwise depending on the position of the well. A well with only a single stone cannot be moved.
After your move, starting with the well you last placed a stone into, any wells that have exactly two stones may be placed in your scoring well. If there is a well that you cannot score (it has a number of stone other than two and cannot be your well), then any that come after it in sequence may not be scored either.
The game ends when neither player can make a legal move. Any stones left on a players side of the board are added to those in his scoring well. Whoever has the most stones is the winner.