A trifle is a dessert dish made from thick (or often solidified) custard, fruit, sponge cake, fruit juice or, more recently, jelly (gelatin), and whipped cream.
Afel was twelve years old when he saw them. “What are those?” he asked his uncle excitedly. “Skis,” replied his uncle, “And those people are called skiers.” Afel was in love. He wanted to be a skier.