Grease a 9x9-inch glass baking dish. Divide 2 cups Rice Krispies cereal into 3 separate bowls, set aside.

Place 1/3 of the marshmallows and 1/3 of the butter into a large microwavable bowl. Melt in the microwave for a few minutes or until they begin to get big and puffy and the butter is melted, watch carefully. Take them out, stir well and add blue food coloring. Immediately stir in 2 cups of Rice Krispies, mix well. Press into prepared baking dish with wax paper or buttered hands.

Repeat steps for all 3 layers starting with the blue, then white and then red. Let cool, cut, serve and enjoy!