Introductory vocabulary in Mandarin

The video features Billy playing a simple game with his dog, Been Boo, where Billy points at objects and Been Boo identifies them. The transcript includes a series of unclear phrases and dialogue, followed by a review of things Billy and Been Boo observed on their walk to school, encouraging viewers to repeat after Been Boo.

How does Billy's interaction with his dog reflect their relationship?

What does the phrase 'National summer' refer to in the context of the text?