Melt the butter over low to medium heat in a large saucepan
Add the marshmallows and lower the temperature to low
Stir frequently while the marshmallows melt
Remove from heat
Pour the melted marshmallow into three separate bowls
Use the blue and red food coloring to color one bowl red and one blue leaving one white
Divide rice crisp cereal into the three bowls
Mix the cereal into the melted marshmallow - see notes below if marshmallow has cooled off too much
Tip - before mixing the marshmallow mixture- spray silicone utensils with butter spray so the marshmallow does not stick to them
Place your gloves on and spray them with butter spray
Start packing your popsicle molds with red, then white, then blue rice krispies mixture
Place popsicle sticks into the center of the rice krispies treats
Let them cool off so they mold together
Push the rice krispies out from the bottom while gently tugging so the layers do not come apart
You may need to reshape the bottom a smidgen so it is rounded or curved again