ThinkFun - Gravity MazeFalling Marble Logic Game Build a path through the towers to get the marble to the target and you win! This gravity powered logic games is sure to put your visual perception and reasoning skills to the test. The towers cab be arranged in a wide variety of visually stimulating structures but, for each challenge, you'll have to think carefully to build a path the will carry your marble to the Target tower. Features: Game Grid, 9 Building Towers, Target