It's the childhood fashion in many parts of the world. You can always find a stick and an old wheel. It's fun and requires practiced skill when steered downhill.
On a dirt track in rural Laos, I was followed by a melodic "dtang-dtang" and discovered that the source of this unknown, but nostalgic sound was that of a stick on a bicycle rim, rolled in similar style.
Maybe it's early training for leading the water buffalo to the field. Or maybe it's a rudimentary metaphor of how we really can tap at our rims of fate and guide them in the way most true to ourselves.