A game for two players comprising two translucent tubes made from injection moulded polystyrene with eight internal dividing discs with central holes, through which four black and four white marbles are shaken from one end of the tube to the other. The game is won by the player who completes the task in the shortest time. The game may also be used as a puzzle by which the marbles are manipulated so that one ends up in each section. Variations of the puzzle can be attained by alternating the black and white marbles. Manufactured in the 1960s by Rovex Industries under licence from MB. The tubes are presented in an illustrated box.