Who is Hippo Pottymouth program at Watchung Public Library Posted on January 24, 2017 by mascoteditor Who is Hippo Pottymouth program at Watchung Public Library 10:30 am – 11:00 amMarch 8, 2017 Join author Kenneth Lefkowitz at the Watchung Public Library for the Who is Hippo Pottymouth program in Watchung, NJ at 10:30 am on March 8, 2017! More about Who is Hippo Pottymouth program at Watchung Public Library