I wonder if snakes will ever figure out they could live inside a shell, coiling up most of their body inside it and using what is outside to slither along, retracting fully inside when there’s danger.
Octopuses do this - but I'm not sure the raw materials for that sort of adaptation exist in the same environments snakes live in.
Snakes could also carry around random objects by coiling their bodies around them and then slithering along, dragging the object with them. They could for instance do this with rocks, carrying them around and stacking them up in piles to form complex structures.