I'm Transforming. The Crocodile Wants to Be Held

In the third book about the fourth graders who are learning to transform into animals, there are even more mysteries and secrets.
The main characters are waiting for a trip to the zoo—it seemed like a great chance to feel their animal forms! However, it's not so simple. Oscar dreams of turning into a dinosaur, but he hasn't succeeded yet. Lucy isn't even sure she wants to be a shapeshifter. Meanwhile, heavy boxes with unclear contents are brought to the school, and rumors about a dangerous crocodile are spreading through the city…