Quackenstein, who is jealous of all the other zoo animals' friends and family, adopts an egg and cares for it until it hatches on a dark and stormy night, revealing a surprise.
Although Arthur the platypus has a terrible time remembering everything from his hat to the names of the oceans, he finds that there are some important things in his life which he can remember.
Patty does not know the answer when other animals ask what kind of creature she is, but she is willing to try flying, swimming, and gnawing wood to help them figure it out.