I liked that you interviewed people of such varied age demographics. This contributed to a great diversity of insight and opened your mind to different modes of thinking.
I wish you had elaborated a bit more on your observations in the grocery store. I’m not completely sure what you were trying to convey by noting the difference between the Annie’s product placement and the snack aisle.
What if you conducted a focus group with both the kids and parents interacting? This could yield potent insights into the dynamics and psychology at play with the snacking experience.