Ralph, Sarah and the rest of their class visit the zoo. Despite the fabulous attractions on offer they learn that the zookeeper may be forced to close his business and make way for a factory that creates TEXTA pens.With Black Texta doing everything in his power to make sure the zoo does close, Penny and her friends are forced to take action to try and stop him, but will they succeed and save the zoo?Find out in this wonderful new addition to the Penny the Pencil Series.