This book is very interesting, and a great pick-up-whenever and explore book. There is a lot of great information about all sorts of things in space, and explains it in a simplified way. There are great pictures, flaps to lift, and cut out, and words all over the page for an interesting format. This book would be good for grades k -2. The reason why I gave this book a 4 out of 5 is because, while the format is fun and interesting, it could be kind of distracting and hard to read straight through. It works well as a pick a page, and read something kind of book. ( )