Did you know that the first train reached a top speed of only 5 miles per hour, that helicopters are also called whirlybirds, and that some submarines can stay underwater for months at a time? Learn more surprising facts in this lively and fascinating picture book all about vehicles. Wow! is a fantastic series not only filled with the best and most amazing facts about popular science topics, but each book also includes beautiful illustrations with fun and interactive artwork clues that lead readers through the book and stimulate discussion. This appealing series is certain to make readers say "Wow!"over and over again.