Product Description: If your kids are learning about Earth and how the power of water to erode Earth's crust to create a massive Grand Canyon, this might be a good resource. Why does the Mississippi River not create a canyon, too? Your kids will be able to answer that after seeing this video. This is also a great resource for teaching deposition (the Mississippi river) versus erosion (the Colorado river), sea level changes, how rocks are formed (shale versus limestone), and geological processes