1. In a large saucepan, melt the butter over low heat. Add the marshmallows; stir until melted. Remove from heat.
2. Add the cereal and stir until well coated.
3. Use a buttered #12 scoop (1/3 cup) to portion out balls, then round them with oiled hands. Place on parchment or wax paper to set.
4. Glue on candy eyes with frosting.