I've never tried to make butter, just got interested in it a few days ago. I know I need to start with cream. Can I use "heavy cream" as in the grocery store kind, or do I need to start with fresh cow's milk, which I don't have but could get? Also, I've looked at the small butter churns on ebay and Lehman's, could I make butter with a plastic pitcher and a plunger and of course some elbow grease just as well? Any suggestions on making butter, churns, molds would be great. I have three little ones around my feet, so I may not be able to check back until this afternoon's naptime. Thanks ahead of time.