Hop over to Amazon and get a deal on Gravity Maze Marble Run Brain Game & STEM Toy. It’s a gravity powered maze game that comes with 60 challenges of increasing difficulty, from beginner to expert, and makes a great birthday or holiday present for kids who like puzzles, smart games and challenging activities. It … Continue reading Gravity Maze Marble Run Brain Game & STEM Toy $19.99 (Reg. $34) – 30K+ FAB Ratings!