Told in rhyme, punctuation station is a train station where marks are taught, such as the period, the comma, the apostrophe, quotation marks, question mark, hyphen, and exclamation point.  Book could be repeated for each grade at which the various marks are taught.  There is quite a bit of activity in each picture, so young students will get distracted.  The end of the book reviews all the marks and gives examples of how to use them.