Age range 5+ Hello, freight trains and trams. Hello, monorails and passenger trains. Hello, . fun! The popular Seedlings series now offers irresistible introductions to six types of trains. Written in a friendly voice, filled with dynamic photos, and featuring text crafted for the youngest of readers, these newest books touch upon the parts and roles of trains in communities. Each book closes with a labeled-image guide for further review. As introductions to informational text, these titles will plant the seeds of knowledge! A kindergarten-level introduction to subway trains, covering their drivers, role in transportation, and such defining features as their sliding doors.