Junie B. Jones was the first full series of books that I finished. I started reading them when I was about 7 or 8, third grade, when my little sister was born. I could relate to these books a lot. I always thought the journal entries were interesting and funny to read. This was my favorite series that I read in elementary school.
A (three-year) Q journal for your kid. I love the idea of sitting down to "interview" your kiddo every day. It's important to give them moments when they feel like the most important person in the room! Also, what a great way to remember the weird shit they say.