One of the easiest ways to make a book is to put your pages in a notebook. You can often create a cover and slip it into the plastic sleeve of the notebook. Hole punch your pages, pop them in, and you have a picture book.
You could also take your pages to Kinkos (or a similar operation) and have them spiral bind the book. You can even request a clear, plastic protective cover. While you’re there (and before the book is spiral bound) you could even have a few copies made for family and friends!