Parents need to know that the villains in this book are ridiculously bad authority figures. Over-the-top evil deeds and bad attitudes abound, but good wins out in the end. The broad satire is funny, but the cynicism is what skews the age recommendation to 9. Younger kids will probably enjoy the lighter tone of the animated TV show based on the book series.
Positive messages:Bad guy Professor Kilowatt makes a racist comment in regards to country club applicants. Over-the-top evil deeds and bad attitudes abound, but good wins out in the end.
Violence:Jacob's dinosaur is threatened with bombs.