Butter is easy to make. Shake whipping cream like CRAZY. Ta Da butter!
I have made butter by putting whipping cream and a couple of marbles into Tupperware and shaking the container while watching a movie. The results were delicious albeit time consuming.
The easiest way to get butter is to use an egg beater. Mix the whipping cream until it thickens and keep going until the buttermilk separates out and you have a lump of butter. Squeeze out the remaining buttermilk with your hand or place butter in cheese cloth.
Add in desired herbs or just a pinch of salt.
Store in fridge.
This makes for a great science project for children or bored adults or adults who enjoy acting like children or people who just want amazing butter to spread on food.