Ice cream in a bag

This is a very fun way to teach a little science when making a yummy treat.

I first did ice cream in a bag when I worked at summer camp.  It's one of those projects you do and you are just amazed with how easy it is.

Ice cream in a bag 
(excellent video here)

1 cup half and half
2 Tbsp sugar
1/2 tsp vanilla
1/2 cup salt (Rock works best, but kosher or table work fine)
Ice cubes
1 gallon size ziplock baggie
1 pint size ziplock baggie

1. Pour half and half, sugar and vanilla into pint size baggie. Seal tight.
2. Put ice and salt in gallons size baggie.
3.  Put small (sealed) baggie inside gallons size baggie.
4. Shake for 5 minutes.
5. Open up small baggie and enjoy ice cream!