3D art mediums we never my strong suit in school, but if I had bases like these that might be a different story.
These are called Munny base bodies. They’re soft vinyl figures that you can build upon to make whatever you like! I stumbled upon these thanks to an artist who does just that.
EatToast makes her creations by picking up the blanks and then builds each body up by hand. Layering sculpy and paint to an absolutely beautiful effect. My favorite one of her collection was her cyberman design, but her entire gallery is worth a look through as she also does beautiful color pencil art work as well.