Pour the oats into a large mixing bowl.

Add the red sanding sugar, green sanding sugar and white sparkling sugar on top of the oats.

Stir with a big spoon for about 1 minute, until the color is streaked evenly through the oats rather than sitting in one corner.

Spoon 1/3 cup portions into small cellophane or paper treat bags.

Tie each bag closed with ribbon or twine, leaving a little air at the top so the mix still moves when shaken.

Store the sealed bags in a cool, dry cupboard until Christmas Eve, up to 2 weeks ahead.

On Christmas Eve night, have the kids scatter a small handful across the lawn or porch step before bed.