Mrs. Crumble assigns each student to bring a different ingredient so the class can bake a Super-Duper Round the World Chocolate Cake. When Josh forgets his ingredients at home, his magic backpack saves the day by flying Josh to Uncle William's cocoa plantation in Ghana.Mrs. Crumble assigns each student to bring a different ingredient so the class can bake a Super-Duper Round the World Chocolate Cake and when Josh forgets his ingredients at home, his magic backpack saves the day by flying Josh to Uncle William's cocoa plantation in Ghana.