The camping trip are still my favorite chapters. This one strikes a cord because I was like this when I was little. I was a rowdy kid. I'd break something every week, get cuts and bruises every day. When my grandparents were visiting or we were going to visit them, I would behave for 1 week. So I can tell them I was a "Good Boy" and get a present/reward/souvenir.
And like Yotsuba's grandma, they'll "trick" me first by giving me fruits and vegetables as my "present" lol. So I would sulk and they would eventually give me the actual present, which is always a toy XD