Acorns

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 377.7 Hz, 64 cents flat 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.

Tap it to pop the caps and sprout the acorns. Hands-on: pull a cap off and put it back.

An acorn is the nut of an oak tree, with a little scaly cap on top. Inside is a seed that can grow into a whole new oak. Squirrels and jays bury acorns to eat later and forget some of them, and those can sprout, so the animals help plant new oak forests.

Tap it and the caps pop off, flip through the air and land upside down on the leaf, and a green sprout pokes out of each acorn and opens two tiny leaves. Then the sprouts draw back in and the caps hop home. Pick an autumn or a green leaf in the Splash tab. With ✋ Hands-on on, pull a cap off and put it back on: brought close to its acorn, it settles home.

Made in Splashery. Its code is MIT.

This link opens it in the Playground. To put it on your own page, add the element and one script tag. Every option.