What is in this image? Describe it as if you were explaining it to someone from the 15th century.

You are looking at a drawing of a curious and fantastical mechanical cart, unlike anything in your time. Imagine a wagon built without the need for horses to pull it. This cart bears a front section, resembling the blocky face of a friendly beast, equipped with round lanterns for eyes and a broad smile. The back part of this cart is laden with what appears to be a hill of stones or perhaps a kind of mineral, but likely it''s designed to carry whatever goods one might need to transport, much like a cart pulled by oxen.This mechanical contraption rolls upon four circular wheels, each perfectly round and sturdy, made for moving on its own without the intervention of animals. Imagine it as a sort of self-moving carriage, crafted by the minds of future alchemists and inventors to ease the burden of manual or animal-driven labor in transporting materials or goods. It''s a fanciful notion, a leap of human ingenuity, using imagined mechanisms hidden within its body to move about.