Final answer:
During their 1st journey to Hogwarts, Ron tells Harry that he has 'about six of' the Chocolate Frog cards.
Step-by-step explanation:
In the first journey to Hogwarts, Ron tells Harry that he has 'about six of' the Chocolate Frog cards. The Chocolate Frog cards are collectible cards that come with the Chocolate Frogs sold on the Hogwarts Express. Each card features a famous witch or wizard, and Ron is excited to have a collection of them.