How could you describe a cylinder to someone?

Imagine a circle. Now, take that circle and stretch it straight up, like a long, round tube. That's a cylinder!

Here are some other ways to describe it:

* Shape: A cylinder has two flat, circular ends and a curved side.

* Like: It's like a can of soup or a roll of paper towels.

* Properties: A cylinder has a height, a radius (the distance from the center of the circle to the edge), and a circumference (the distance around the circle).

Does that help visualize it?