Introductory Videos
For a quick introduction, see the following YouTube videos, but be aware that for the current version of VPython the name of the module is "vpython", not "visual", and the graphics display is shown in a browser tab rather than in a bare window. (For GlowScript VPython, you can omit importing vpython.)
3D Objects (Spanish version Objetos 3D by Javier Carro)
Variable Assignment (Spanish version Asignación de Variables by Javier Carro)
Beginning Loops (Spanish version Comenzando con Bucles by Javier Carro)
Loops and Animation (Spanish version Bucles y Animación by Javier Carro)
Scale Factors (Spanish version Factores de Escala by Javier Carro)