underground, the mycelium grows and spreads from the center, forming a circle. As time passes, the nutrients in the center are exhausted and the center dies, thereby forming a living ring, from which the fairy ring legend arose. But we can only see the mushrooms on the surface that form the wide circle.
Mysterious glass balls that kids collect.
This is what the semi-finished product used at glass factories looks like. Balls often fall out during transportation and impress the children who find them.