Preowned. Complete! The ThinkFun Gravity Maze Logic Falling Marble Game is a STEM toy designed for boys and girls aged 8 and up. This board game by ThinkFun challenges players to use gravity and logic to navigate marbles through a maze of building towers. With 60 challenge cards ranging from beginner to expert levels, this complete game includes everything needed to have fun and develop strategic thinking skills. Recommended for ages 8-16 years, this Toy of the Year award-winning game is perfect for solo play or multiplayer fun.