Here's why:
* Ancient Origins: The actions of hopping, skipping, and jumping are universal and have been around for centuries. Children throughout history have engaged in these playful movements.
* Folklore and Literature: The phrase might have sprung from oral storytelling or folklore, where simple and evocative descriptions were preferred.
* Gradual Evolution: The idiom likely evolved gradually, starting as a simple description and becoming more refined over time.
Therefore, pinpointing the exact origin is difficult. It's more important to recognize the idiom's enduring power in conveying a sense of close proximity and ease of access.