I used the table of contents with my students to chose which animal to read about first and to model that these books don't have to be read in order. After reading about each zone, we listed all the animals that live in that zone on a large piece of chart paper.
Each student received an index card to illustrate an interesting animal from that zone.
The students then glued their pictures to the poster near the name of their animal. We displayed our posters in the hallway.
We also used Dr. Jean's song called Oceans on her Sing to Learn CD. You can download a printable book to go with the song on http://www.drjean.org The song is sung to the tune of "My Bonnie Lies Over the Ocean" and can be used without the CD.