Blend the base: Add milk, ice cream, ice, marshmallows, and syrup to a blender. Blend until smooth and fluffy.
Optional color swirl: Divide the mixture into separate cups, add a drop of food coloring to each, and gently swirl colors together when pouring into serving glasses.
Top it off: Add whipped cream, mini marshmallows, sprinkles, and glitter.
Serve immediately with a wide straw and a smile! 😋🦄