I am a total noob when it comes to Japanese, so I am reading よつば Vol.1 to try and pick up some simple words/phrases.
On page 4, Yotsuba's father says, in response to her asking if there is a festival that day:
I understand that he is telling her that there is a school, but is there a reason why he says this instead of just
I figure this may just be an expressive thing, almost as if to say "Calm down, it's just a school", but I wanted to check if there is some grammatical reason why he says this.
Apologies if this question does not belong here, or if I have misunderstood something!
The panel in question: