Over Christmas break, Lylli decided to do a science project. She asked me if butter was made out of oil. I told her it was made out of cream. So we decided to make it into an experiment. She did some research and she tried several methods. One of them was shaking them in a jar with a marble. She tried cream, oil, and a combination of the two. The cream worked. The oil didn't. And the combination turned into thick whipped cream but nothing more. She tried it with a mixer too and without the marble. She had a great time and loves her homemade butter!!!