Meanwhile, in medium microwavable bowl, microwave chocolate chips uncovered on High 1 to 2 minutes, stirring every 30 seconds, until softened and chips can be stirred smooth. Dip half to three-quarters of each strawberry in melted chocolate; place on waxed paper. Repeat with marshmallows. Place 1 cake ball on fork; dip cake ball in melted chocolate to cover. Gently tap off excess. Return to cookie sheet. Repeat with remaining cake balls. Let dipped strawberries, marshmallows and cake balls stand until set.