I read that some elementary schools teach the kids
how to do this in their science classes and most of
them are excited and amazed that it is so easy to
All you need is some cream and a jar.
This is part of a video Robert Krampf (who calls
himself "The Happy Scientist") made about
His web site is: http://thehappyscientist.com/
You can also make butter using a Food Processor:
This is part of a video made by Chef Kevin DePartie.
His web site is: http://www.inthemoodforfood.com/
NOTE UPDATE: My host (blogspot) has been having
trouble playing the videos so the original longer
versions on youtube are at:
Making butter with jar:
Making butter with food processor: