Cat's Life.

Cat, that went up the hill.
Just to get her fill of adventure.

Cat, that went up the hill on a unicycle.
Just to get her donuts.

Cat, that went up the hill on a bike.
Came back down with a boyfriend.

Cat, that went up the hill on a monorail.
Came back down pregnant and with jewels.

Cat, that went up the hill in a car.
Came back down with a mud slide after her.

Cat, with a will to live longer went up the hill.
She never came back down herself.