GREASE 6 muffin cups.
MICROWAVE 12 Nestlé Hearts in medium, uncovered, microwave-safe bowl on MEDIUM-HIGH (70%) power for 50 seconds; STIR. The Nestlé Hearts may retain some of their shape. If necessary, microwave at additional 10- to 15-second intervals, stirring just until melted.
COMBINE marshmallows, butter and corn syrup in medium bowl. Microwave on HIGH (100%) power for 15 seconds. Stir until marshmallows are almost melted. Add melted chocolate, cereal and coconut; mix well.
PRESS mixture onto bottoms and up sides of prepared muffin cups. Refrigerate for 1 hour. Remove chocolate boats carefully with a small spatula. Let stand at room temperature for 10 to 15 minutes.
PLACE small scoop of vanilla ice cream inside each boat. Top each with 1 whole Nestlé Heart; drizzle with Nesquik.