Sale has ended but you can still get this app.
Download Little Hopper's Treasure Hunt Now

Official Description

Little Hopper's Treasure Hunt is a fun introduction to graphing and the Cartesian coordinate system. Learn to read and identify points on a graph using the Cartesian coordinate system while searching the ocean for treasure and surprises. Game play is in the style of classic battleship strategy games. This program is ideal for students new to graphing in grades 2-5.