The ThinkFun Gravity Maze is a gravity powered maze game that comes with 60 challenges of increasing difficulty, from beginner to expert. It makes a great birthday or holiday present for kids who like puzzles, smart games and challenging activities.Gravity Maze is made with high quality components and comes with a very clear and easy to understand instruction manualyou'll be able to play within minutes of opening the box. This game is built to develop critical thinking skills and tie into STEM subjects like science and engineering. Playing through the increasingly difficult brain teaser style challenges will sharpen your mind by improving logical reasoning, spatial reasoning and planning skills. Pack size: 24.1 x 7.6 x 26.7cm (9.5 x 3 x 10.5 inches) Includes game grid, 10 gravity maze towers, three stainless steel marbles, 60 challenges and instructionsFalling marble logic gameBeginner to expert levelsSingle player or group play Suitable for ages eight years and overGreat for fun ST