PREHEAT oven to 300°F Place syrup, butter and cinnamon in large microwaveable bowl. Microwave on HIGH 1 min.; stir until butter is completely melted. Add cereal and peanuts; mix lightly. Spread into lightly greased 15x10x1-inch baking pan.
BAKE 30 min., stirring after 15 minute Cool completely. Break into pieces; place in large bowl.
ADD marshmallows and candies; mix lightly. Store in tightly covered container at room temperature.