Have you noticed how most children these days speak in a way that shows how optimistic they are? They finish every sentence with a higher pitch in their voice. When they tell you about something it makes it sound like they are asking a question, but they're not. When their voice pitch goes up at the end of each sentence, to my ear it sounds like they are saying, "I want to tell you about my day? And if I keep talking this way? It makes me feel like everything will turn out alright? So, even though I'm not old enough to know life is not always a fairy-tale? I think that it is?"
For fun, I'm going to say they are talking in the "Perfect Future" tense, (instead of "Future Perfect" like you'd see in a grammar book). "Perfect" is a tricky word. I actually try to avoid it so that I can be more open to many possibilities. But for children, maybe for most of them, they hope their future IS perfect or at least something to look forward to. Many of them seem content with their present (what a great quality!), and if painful things happened in their past (like this movie), "perfect future" still often marks the way they speak. I think the word "perfect" here, merely means happy and content.
Voice specialists call this way of speaking an 'open cadence' because it sounds friendly and invites the listener to participate, as opposed to a 'closed cadence' which people use to make a statement or a demand (like grown-ups).
I adore it when children talk in "Perfect Future". It reminds me that I can think about everything with more optimism and hope. However, I'm probably going to continue to speak like a grown-up?