When Peanut Butter Cookie was first born, he was very small. He was half the size of his sister, Sugar Cookie. Peanut has grown fast and is a little bit bigger than his sister.

"Does that mean I'm older than Sugar?", asked Peanut.

"No, you are both the same age and will always be the same age", I said.

"How old am I?" Peanut wanted to know.

"Well, let's see... You and Sugar were born five months ago but, dogs age seven years for every human year. That means that you and Sugar are three years old today! Let's have a birthday party!"

Peanut got excited. When Peanut gets excited he jumps up and down and flaps his ears.

"Sugar, Sugar!", I called.

Sugar came walking to where we were. Peanut said, "We're three years old today! We're going to have a party!"