Penny feels guilty after taking a beautiful blue marble that she sees in Mrs. Goodwin's grass, but gets a pleasant surprise when she goes to return it the next day.

There is only one way for Chester to do things-his own way. "You definitely have a mind of your own," said Chester's mother. "That's one way to put it," said Chester's father. Luckily, Chester's best friend, Wilson, likes doing things just the same way as Chester. When they cut their sandwiches, it's always diagonally. When they ride their bikes, they always use hand signals. If Chester is hungry, Wilson is too. They're two of a kind-until indomitable...

When brave Sheila Rae, who usually looks out for her sister Louise, becomes lost and scared one day, Louise comes to the rescue.