Spray a large mixing bowl lightly with cooking spray and place popcorn inside.
In a medium saucepan, melt butter over low heat. Stir in marshmallows and gelatin dessert powder until marshmallows are melted and mixture is smooth. Pour over popcorn and mix well until coated.
Spray hands with cooking spray and press firmly to form into 9-inch logs and then bend to form ‘wreaths’.
Place ‘wreaths’ on wax paper. Press candy decorations onto wreath to decorate; add a ‘ribbon’ cut from fruit leather. Serve immediately or wrap individually in plastic wrap for storage. Add a ribbon tie to plastic wrap as a decorative closure.
Clean-up tip: Soak saucepan before cleaning.