This interactive from Kinetic City provides the opportunity to experience how mountains, rivers, and canyons were formed. In this activity, you are presented with two images: one is a picture of a landscape as it currently is and the second is an image of the same landscape as it could be in the future—or their goal. Your job is to choose the force of nature you think is needed to get to the goal and then choose the length of time you think it will take to get to that goal. If you make a wrong choice, the game will let you know and you get to choose again.
The "Learn More" button provides you with more information about the forces of nature involved: volcanoes, water, glaciers (ice), and wind.