My daughter likes stuff like this so I made some models.
The spring rig is 4 bones with stretch to on each and less influence on the lower bones.
I could make a rig that squishes well and one that bends well but not one that does both. But i kinda like the cartoon effect.
The wheel burn out was the way we used to draw em in the 5th grade a long time ago.
i put 5 lattices on 4 cubes then on a curve circle and rotated. To start I was trying to break one water drop into 4 drops but the lattice would not remove the cube edges. if that makes any sense. I got side tracked to this. Ill try mesh deform…maybe…someday.