Bake Play Smile
Place the marshmallows and butter in a microwave safe bowl. Melt on 50% power for 2 minutes, stirring every 30 seconds. Stir the marshmallows and butter until smooth and creamy.
Place the rice bubbles into a large bowl. Pour the melted marshmallow and butter mixture over the rice bubbles. Mix until well combined.
Press the mixture very firmly into a prepared baking tin. Add sprinkles or 100s and 1000s over the top (optional). Chill in the fridge for a minimum of 2 hours.