Line 2 small baking sheets with parchment paper or foil. Freeze for 10 minutes. Remove 1 sheet. Using a melon baller, scoop the ice cream to form 1-inch balls and place on sheet. Return sheet to freezer. Repeat this process with second sheet. Freeze the balls for 30 minutes. Arrange the chopped malt balls, Heath bars, and PayDays on small plates. Working with 1 baking sheet at a time, roll the ice cream balls in the toppings, using your hands to gently press in the toppings. Freeze for 30 minutes. For the white chocolate truffles, melt the chocolate in a bowl in a microwave or in the top of a double boiler. Dip the chilled balls, one at a time, into the melted chocolate. Remove with a fork, letting the excess chocolate drip back into the bowl. Freeze for 30 minutes.