Show children how to shell eggs. Use plastic knives to cut egg in half. Scoop out yoke and mix with either mayonnaise or yogurt. Fill boats with mixture. Cut triangle cheese sails.
Place sails on top of filling.
Pour into individual dishes. Garnish with whipped cream. Melt these three ingredients in top of double boiler. Take off heat and cool to lukewarm. Then fold in 2 cups colored miniature marshmallows.