Question

Throughout the story sometimes grandma and grandpa are capitalized and sometimes are not capitallized. How come?

Answer 1

Terms like grandma and grandpa are capitalized when they are used as titles that refer to someone or something, rather than a regular common noun.
For example, if you were to say, "Let's go to Grandma's house," then that would be capitalized because you are referring to your grandmother with a title, instead of saying "Let's go to my grandma's house," where you are simply stating a noun.
In short, think of titles like names. It's kind of like saying "boy" v.s. "Adam" if you think about it. Hope this helped!

Answer 2

grandma and grandpa can be a general term like the grandpa was walking. In the cases when it is capitalized, grandma or grandpa is being used as a name like, "Hey Grandma, can we go to the store?" an example of non capitalized words would be, "my grandma is very kind." Hope this helped!