I assume you're referring to the popular French children's book series "Le Petit Nicolas" (also known as "The Little Nicolas") created by René Goscinny and illustrated by Jean-Jacques Sempé. The series follows the adventures of a young boy named Nicolas and his friends in a suburban Parisian setting.
Original French text: " Le petit Nicolas est un garçon de dix ans. Il a des cheveux noirs, des yeux bleus et un sourire qui fait plaisir à voir."
We reached the front door. Dad rang the bell. We waited. Mum opened the door.
While I was playing, a friend came to the house. He heard the bell ring and came inside. He shouted, “Nicolas, are you at home?” No answer. He opened the front door and there was Rex, fast asleep on the rug. My friend called to Rex and said, “Get up, guard dog!” Rex opened one eye and yawned, then went back to sleep. My friend laughed and said, “Your guard dog is lazy.”
I have a dog at home called Rex. He is big and very clever. When I come back from school, Rex is always at the door, wagging his tail and making me happy. He understands everything I tell him. When I say “sit,” he sits; when I say “come,” he comes; when I say “go to bed,” he goes to bed.
English Translation: "Little Nicolas is a ten-year-old boy. He has black hair, blue eyes, and a smile that's pleasing to see."