Examples of Hydrogen Atom Shell Structure.
These were created when I was a graduate student TA for the Oregon State University Paradigms Project. I'm mentioned in a Physics Today paper Paradigms in Physics: Restructuring the Upper Level, Corinne A. Manogue and Kenneth S. Krane, 2003 and one frame of these movies showes up in Integrating computational activities into the upper-level Paradigms in Physics curriculum at Oregon State University, David H. McIntyre,a Janet Tate, and Corinne A. Manogue, Am. J. Phys. 76 (4) 2008
Here is the Maple V file used to create these images: PROBDENS.MWS.
Note: These movies show the probability density as color for a shell of a particular radius about a hydrogen atom. A far more intuitive representation can be seen (and played with) using the excellent Atom in a Box program.