In a medium saucepan, melt 2 cups of marshmallows and a tablespoon of butter over low heat, stirring continuously for about 5 minutes until smooth and glossy.

Fold 4 cups of Fruity Pebbles into the melted marshmallow mixture, ensuring each piece is coated without breaking apart.

Transfer the mixture onto a greased surface and flatten into a rectangular shape about ½ inch thick, which should take about 2 minutes.

Sprinkle your choice of gummy candies or mini chocolate chips on the flattened mixture and press gently to stick.

Roll the mixture tightly into a log shape, using parchment or hands to help guide the roll for about 2-3 minutes.

Cool the rolled sushi for about 15 minutes until firm, then slice into 1-inch pieces.

Serve the slices on a platter and store any leftovers in an airtight container for up to three days.