Our local library had a summer reading program. You needed to talk about the book to a librarian, so we were waiting in line. The kid giving the book report was under 3 so it wasn't much of a book report, she asked the usual questions including "what was your favorite part of the book?"

The book the kid had read was Dinosailors which is about some dinosaurs who go on a sailing trip. The memorable part of the book is the page with no words that's just the dinosaurs throwing up because they all got seasick.

So, the non-verbal child happily reenacted their favorite part of the book.