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Keep untreated full-cream milk, shake cream ("Sahne") to make butter

On their way back from Egypt the children of Israel were looking for a country where milk and honey are flowing.
You can make cream, butter and chease from milk and honey from sugar.
What you need
Infusions bottle with 50 ml freshly milked milk, injection bottle with 5-ml cream
Experiment
* Left: Leave 50 ml milk from a farmer cooled for one night.
* Middle: Transfer 5 ml of cream into an injection bottle close it and shake for some minutes.
Observations
* Left: Cream floats on untreated milk.
* Right: Butter separates as a solid on the surface during shaking.
  You can be spread this butter on a piece of bread.