Mister Rogers brings some dirt in to make mud pies. He builds a dam and then allows the water to escape from the pool. Professor Fitzpatrick shows some pictures of the sea by Winslow Homer. He shows how to draw a calm and a rough sea.  In the Neighborhood of Make-Believe, Corney and Joey Hollingsworth are digging a well. Mr. Hollingsworth shows how a pump works.  Corney gives Mr. Hollingsworth a hat with a rocking chair on top for his next selling trip. He pantomimes how he will sell rockers.