Arthur does not approve of a new fad, cute toys called Woogles, but after seeing how popular they are, he tries to get one. After several failed attempts, he gets a Woogle from Grandma Thora, but then he starts playing with a bottle cap and starts a new fad. Arthur brings a cake his father made to a party in Mr. Ratburn's class celebrating Galileo's birthday. Everyone enjoys the cake, so Arthur brings in even more desserts to build his school popularity, unaware of the work he is imposing on his father until he sees that he made his father fall behind on a crucial order for Muffy's father. Arthur and D.W. then assist their father with his baking. Throughout the episode, Mr. Ratburn keeps using a spring reading list as an excuse to join Arthur's parties and eat his cakes.