One of our "100 summer of fun" things to do was to make homemade butter.  As soon as the kids got up we made butter bright and early just like the pioneers.  :)  We grabbed the whipping cream, poured it in a mason jar, sprinkled some salt in it, placed a lid securely on top and we shook and shook and shook and shook AND shook until we had the finished product... fresh homade butter.  YUMMY!!