The Class Trip / 
Grace Maccarone. 
 -  Scholastic,  c1999. 
 - 
<br/><br/>Lex 160 
<br/><br/><br/>in English 
<br/><br/><label>ISBN: </label>9780439067553 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoos<br/>Zoo animals<br/>School field trips<br/>Lost children<br/>Stories in rhyme.