When the class has a bike parade coming up, Molly admits to Betsy that she doesn't know how to ride a bike. With the help of Kenji and Betsy, Molly finally learns how to ride her bike and stars in the parade. After Kenji says giants are causing the sound of thunder, Betsy and her classmates become extremely scared when a storm comes through. Mrs. O'Connor eases their fears with the truth about thunder and lightning and how it really works.