A common way of visualizing the wavefunction in 3D is through isosurfaces, which is defined to be a surface on which the scalar field is a constant called the isovalue. A visualization library readily available in Python through the pip package installer is ipyvolume 50 and was used in combination with ipywidgets 51 to make the interface here. As shown in Figure , the 321 state of an anthracene-like rectangular 3D box has three positive lobes and three negative lobes shown in red and blue, respectively, with regions of nothing in between, reflective of the n -1 relationship between quantum number and number of directional nodes. The probability density can be similarly displayed by b) a)