In my opinion, Carroll (the author of the story) is trying to tell children, everyone who read this book that it could be weird, strange when you growing up as you were a child.
The evidence is after Alice change the size many times in a day and meet Caterpillar, she said "I can't explain myself becaose I'm not my self, I'm afraid" and "all I know is it feeling very queer to me" queer means strage, weird.
This is my own view with the story, I'm not sure it would pls you or not but hope this helped :3
