I read this to my 4-year-old niece, and couldn't resist making comments while reading it. It opens with Batman swinging around Gotham City on a sunny day (and smiling). This is very OOC, and I said so. Later, a bunch of seagulls steal people's food at the beach, and this is supposedly strange behavior (no; that is completely normal for seagulls). I know it's a book for early readers, but I couldn't resist. Later, I heard my niece "reading" the book (repeating verbatim everything I had said/read). If she's anything like me, she'll re-read the book when she learns to read on her own and be very annoyed to find that I added things that weren't in there.
"Oh, you can’t help that," said the Cat: "we’re all mad here. I’m mad. You’re mad." "How do you know I’m mad?" said Alice. "You must be," said the Cat, "or you wouldn’t have come here.”