Iris and Walter can't wait for their class field trip to the aquarium. They'll get to sit together on the bus and visit scary sharks, shimmery angelfish, and, best of all, penguins. The aquarium is everything they had hoped for--until suddenly Walter gets lost It's a good thing his best friend, Iris, knows what to do Here are four chapters of easy reading pleasure in this new Level 3 Green Light Readers edition featuring sweet and sensitive illustrations by Christine Davenier.