In the sandwich sized ziplocking bag, add milk, sugar, and vanilla. Seal bag tightly.
In the quart sized bag, add the ice and salt.
Place the smaller bag inside the larger bag and seal tightly.
Shake the bag as hard as you can, without popping it open, for 5 minutes or until it reaches the consistency of ice cream.
Remove the smaller bag and give it a quick rinse to remove any pieces of salt. Make sure you rinse the opening as well.
Open the ice cream and eat it straight out of the bag with a spoon.
