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

This drawing depicts a child seated atop a large, fanciful creature that resembles a steed, yet bears a longer neck and humorous semblance, suggesting play and imagination rather than realism. The creature, akin to tales of exotic animals from distant lands, is adorned with patterns reminiscent of clouds, and the child clutches a harness to stabilize atop this gentle creature. The image represents a simple, joyful moment, captured with bold lines and clear forms, likely intended to amuse or delight the viewer with its charming and whimsical character.