Step 1

Coat a 9-by-13-inch baking dish with nonstick spray.

Step 2

Melt the butter in a Dutch oven or large pot over low heat. Add the marshmallows and food coloring and cook, stirring, until the marshmallows are completely melted, about 3 minutes. Remove from the heat and fold in the rice cereal. Transfer to the prepared baking dish. Spray your hands with nonstick spray and pat the mixture into an even layer. Refrigerate until firm, about 1 hour.

Step 3

Flip the baking dish onto a cutting board and gently tap to release the treats. Trim the edges, then cut in half lengthwise to make 2 long rectangles. Cut each rectangle into 5 equal pieces, each about 2 inches wide. Line a rimmed baking sheet with wax paper.

Step 4

Add the chocolate chips to a small microwave-safe bowl. Microwave at 50% power, stopping to stir about halfway, until just melted, about 1 minute. Dip a short edge of each rectangle into the melted chocolate to create hair. Use a toothpick to move the chocolate around to create special hair patterns. Put a dot of icing on the back of the candy decorations to stick on facial features. Use another dot of icing to stick a mini marshmallow on the sides of each head for neck bolts. Draw on additional features with the icing. Serve immediately or store in a cool, dry place.