Benefit: - Problem Solving - 20 challenging pack puzzles - Geometric Thinking - untangle overlapping line segments - Spatial Reasoning - visualize the result of each step Challenge : - Your challenge is to rearrange the graph so that no lines except the vertices touch or cross each other, and none of the vertices are sitting on top of any of the other lines. How to Play: Touch, hold and drag the connecting points to move the vertices. Tip: The colors of the lines change when you move a point. The lines you are currently moving will be blue. When you win the game, the graph lines turn blue. Good luck and have fun!