When Clifford joins a motley pack of neighborhood dogs as they play in a nearby construction site, their canine capers result in the wreckage of a bulldozer, a crane, and a huge pipe.

Emily Elizabeth tells about Clifford's first Valentine's Day when he was still a tiny puppy. Clifford goes to the post office with Emily Elizabeth to mail valentines and gets lost in the carts full of letters.

Clifford goes to school with Emily Elizabeth to participate in the outdoor sports day activities.

Clifford the Big Red Dog is a lovable canine who joins a traveling carnival when he mistakenly believes that he has become a burden to his human family. As he seeks his fortune in food, Clifford helps his new animal buddies overcome their fears, saves the carnival from going bust, and eventually finds his way back home again to his real family.

Doggedly digging up his roots, Clifford, the big red dog, visits his city-dwelling mother, his brother, who works at a fire station, his sister, a seeing-eye dog, and his second sister, a farm dog.