Pebbles

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 426.6 Hz, 146 cents sharp of G4, the nearest tine on the comb. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.

Drag a pebble to pick it up and set it on another to stack them. Tap to tumble them.

Pebbles are small stones rounded smooth by water. As rivers and waves roll them over and over, knocking against sand and other stones, their sharp corners wear away, a process that can take hundreds or thousands of years. A cairn is a pile of stones stacked up by people, often to mark a trail.

Drag a pebble to lift it and set it on the sand or on another stone. A careful stack stands; one set on the edge topples. The ✋ button turns this off, and reset puts every stone back. Tap it and five pebbles hop one at a time onto a cairn, biggest at the bottom, then all hop back. Pick a pile or a cairn in the Splash tab.

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