Mix together cake mix, eggs and vegetable oil. Add 1/4 cup white chocolate chips and 1 tablespoon of sprinkles to the batter. Spread into a greased 9 in. x 13 in. baking pan. The batter will be thick but easily moved with a spatula. Top with remaining white chocolate chips and sprinkles. Bake at 350 degrees for 15 minutes. Allow to cool before cutting.