Backyard ICBM's for Kids

Each missile is a ball with an accelerometer inside. On the ball you can select multiples of your throwing speed. For example, Johnny's throwing speed is 25 miles per hour and he selects "100X" to throw a calculated velocity of 2500 mph. The ball is accompanied by an iPad. When Johnny throws the ball, the ball and the iPad communicate to measure the starting GPS coordinates, the angle, velocity, and compass direction of the ball. A world map on the iPad takes into account prevailing winds and atmospheric conditions to shows where the missile will land when extrapolated to the higher velocity. That way kids in different countries can throw balls at each other in their backyards and pretend they are missiles and try and blow each other up.