This book and this series (Blast Off! Readers - Insects) is perfect for my six-year-old son! He knows his sight words and is beginning to read slightly above grade level. I like the Blast Off! Readers because the print is written in an easy-to-read font, contains real photographs, and besides being written with 85% sight words, it also introduces at least 15 higher level vocabulary words. These vocabulary words are written in bold, labeled in the pictures and even defined in the glossary in the back of the book. The book also contains an index and a bibliography to "find out more" through other books listed or on the web. It's a thrill to not only see my son excited about the book, but to hear him read it all by himself! Not only that, but after reading so many insect books and "knowing it all" myself, I still managed to learn some new facts from this book!