Jack-o'-Lantern Popcorn Balls

Microwave butter and marshmallows in large microwaveable bowl on HIGH 1 1/2 to 2 minutes or until marshmallows are puffed. Stir in gelatin until well blended. Pour marshmallow mixture over popcorn in large bowl; mix well. Shape into 12 balls with lightly greased or moistened hands. In a microwaveable bowl, melt chocolate chips in microwave on HIGH for 1 minute or until chocolate is almost melted, stirring after each 30 seconds. Place chocolate in a small self-sealing plastic bag, snip off a tiny piece of a bottom corner and pipe Jack-o'-lantern faces onto the popcorn balls. Allow chocolate to set up before wrapping individually in plastic or cellophane wrap.