What a fun book! As the subtitle says: "Braintwisters, Paradoxes, and Curiosities." Filled with questions and common day situations, the authors get the reader to try to figure out the physics behind the phenomena. The reader is not left hanging, however, because the answers are provided. Of particular fun are the facts and quotes in the margins of each page. This book is perfectly suited for middle school students and higher - but some of the physics would be easily understood by 5th and 6th graders with adult guidance.