You joke but I read the dictionary as a kid (and not for the naughty words); helped me expand my vocabulary and gave me knowledge of stuff I wouldn't have known about at that age.
Hey, I did that as a kid too! My school was a glorified daycare, it was often the only reading material available, and it was somewhat more interesting than staring at the clock all day.
I think kids might. I remember reading it front to back when I was first really getting into literacy, hoping to get adults' seemingly godlike intuition for spelling words. Still like to open it up from time to time to peruse a letter