Pictures!

What Emer drew while I talked about rivers:

What Linnea drew (Linnea is 6, p. 1):

The yellow is the mud which makes the Yangtze River yellow. Apparently the spring is underneath a swamp of it. (And can you guess what the triangles on the left are? they're beaks, because it's a bird's-eye view, and the bird can see its own beak).