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

Imagine a scene where fantastical cart-like creatures disembark from a large, floating silver cauldron hovering above the ground. This grand cauldron is not supported by ropes or beams, yet it stays aloft as if cradled by unseen forces. It has various round windows and an opened stairway leading down to the earth.These creatures are bulbous and have a most curious form; they resemble the offspring of a frog and perhaps a crab, possessing multiple eyes on stalks that extend upwards and limbs that end in gloved shapes. These beings appear friendly or comedic, judging by their exaggerated gestures and the items they carry, including a box which might hold their traveling needs.By the side of a rutted road, a sign, crafted as an arrow indicating direction, shows an illustration of their silver cauldron and points towards ''Earth.'' This tableau is both whimsical and akin to the wondrous tales of celestial journeys and otherworldly visitors told around the firesides of your time.The scene is surely meant to amuse or provoke astonishment, with these foreign beings arriving from their celestial travels ready to explore or perhaps share tales of their own realm. It conjures images of marvels and the unknown, evoking tales like those of the ethereal spirits or the mysterious creatures from the distant and unexplored lands.