The light cube table was an electronic game played on a four-sided table in the 23rd century. The game involved two to four players who placed their hands on a square pad in front of them, and lit up cubes in the center of the table.
Commander Willard Decker used the game in an attempt to determine whether V'Ger truly possessed Ilia's memories. He stated that Ilia enjoyed the game and "nearly always won." (Star Trek: The Motion Picture)