This is the function [y = sqrt(x)] from [0, 4] rotated to become a solid. The original function is highlighted in yellow. You can press the arrow keys to rotate the axes to view the function from different angles.
This was created as part of a final project for my calculus class. This is more of a wireframe rather than a solid due to Scratch's limitations, but it gets the point across. (I got an 86 on this assignment thanks a lot)