
Making butter is done by agitating cream until it turns to a solid- butter. Many different types of vessels have been used to do this over the centuries.
I think the most common churn that most people recognize it the dash style churn like the one shown in the photo.
In the 1800's glass jars with a hand crank attached to paddles inside the jar made churning butter a little easier.
You can churn your own butter by placing fresh cream( The temperature should be 60 degrees)
in a jar and shaking it until butter forms- shake at a rate of one shake per second- a clean marble placed inside the jar will hasten the process.
I think that young children would find this a fun activity- a group of children could take turns shaking the jar- to avoid arm fatigue!