A story about rolling marbles

This is a toy where you roll wooden balls along grooves carved into wooden boards.
The eight boards each have grooves in various shapes, such as straight lines, curves, squares, triangles, and spirals.
By rolling the balls along the grooves, children can develop hand-eye coordination, bimanual dexterity, fine motor skills, spatial awareness, coordination, and shape recognition.
As an alternative way to play without rolling the balls, tracing the grooves can also help children experience and understand shapes.

This educational material has been kept in its original box, never used in childcare or at work.
I have fond memories of purchasing it, and considering shipping costs, I've set a price for now. However, I'm willing to consider a small discount for anyone interested.