Grandma Thora Appreciation Day/Fern's Slumber Party (Arthur)

Arthur and D.W. decide to throw a surprise party to celebrate Grandma Thora. In the midst of all the planning, they forget one tiny detail: the guest of honor! / Fern's mom suggests that she have a slumber party. The kids are sure it will be a night to forget, and sure enough, disaster strikes--until Fern's special talents save the night.