

Sam and Ben are friends. They like to play in the park. They see a big dog with a guard. The guard is bald. He has no hair on his head.
"Look at the dog!" Sam says. "He is so big and furry!"
"Can we pet him?" Ben asks. "He looks nice."
They walk to the guard and the dog. The guard smiles at them.
"Hello, boys," he says. "This is Rex. He is a good dog. He likes children. Do you want to pet him?"
"Yes, please!" Sam and Ben say.
They reach out their hands. Rex wags his tail. He licks their faces. Sam and Ben giggle.
They pet Rex for a while. They feel his soft fur. They gaze at his brown eyes. They see his sharp teeth.
"Wow, he is so cool!" Sam says.
"Thank you for letting us pet him," Ben says.
"You're welcome," the guard says. "Rex likes you. You are very polite."
Sam and Ben say goodbye to the guard and Rex. They run back to the slide. They are happy. They have a new friend.
