1. Microwave the butter and marshmallows in a large microwave-safe mixing bowl on high for 2 minutes.
2. Stir together when melted and microwave on high for another minute.
3. Stir in the Fruity Pebbles and mix until evenly coated.
4a. For the pops, fill plastic eggs with the mixture and put them in the refrigerator to set. Once set, take them out of the shell and place a lollipop stick in the bottom of the egg.
4b. For egg treats using the cookie cutter, spread the mixture flat onto a cooking sheet. Use the cookie cutter to cut out egg shapes out of the cereal treats. Put them in the refrigerator to set.