Ice Cream in a bag

Directions

1. 1
   Stir the first four ingredients together in a bowl and then pour the mixture into the freezer bag.
2. 2
   Place closed bag inside a gallon-size bag that is filled with the ice and salt.Shake the bag vigorously on and off over the course of five minutes or so and notice how the mixture changes.
3. 3
   Let it sit for a few minutes. What happens?