Also called skimming stones.

A popular game amongst humans.

Whenever beeing close to the sea or a lake, they look for small flat stones* and toss them in a spinning motion into the lake/sea. The combined effect of force and Hydro/Aero-Dynamics sometimes causes the stone to skip and jump across the surface.

The winner of the game is the person that manages the highest number of jumps.

The game can be played solitare, or with as many participants as possible.

Humans has done this for as many years as they have been on Earth, and still it seems they never run out of flat stones along the shores.
How can this be?

One theory is that being a stone is boring. The most interresting moment in a stones life, are those glorious seconds it skips along the surface. The stone wants to do this again so badly that it crawls back up to the shore and waits for the next time.

This theory is backed up by the fact that there are most flat stones in the tidal area of the shore and hardly any above or below.

* appx 1-3" across