Amazon.com description: Product Description: Treasure hunts are always exciting, especially when you search together with friends. But, have you ever tried a new type of treasure hunt, calledgeochaching? Join five friends as they embark on a high-tech geochaching adventure, using a handheld GPS device. Along the way, learn how to use coordinate grids to plot data points from a table, label ordered pairs, and name coordinate points on a grid. Applied key concepts include the x-axis, y-axis, x-coordinate, and y-coordinate. Navigate to the next clue by using your knowledge of coordinate grids, and soon you will become a master at this game!