One activity that is very popular at our local Waldorf kindergarten is chopping rocks.

What is that you say?
In Texas, limestone rocks are very prevalent.
Basically, the children take a large limestone rock as a base,
put others in the middle, and take a hand size one to chop with.
They just chop away and make their own mineral powder.
They sprinkle it, spread it, feel it with their fingers, mix with water
to make a paste, etc.
They can use smaller pieces just like chalk.
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