Here is a fun food science experiment to try with your kids this weekend. Food For My Family did a post on the Food Your Way Blog
It looks fun and easy.
Here's what she says you'll need:
3/4 cup cream
1/2 cup milk
1/4 cup sugar
1/4 teaspoon vanilla
To Freeze:
1 quart-sized zip-top bag
1 gallon-sized zip-top bag
1/2 cup rock salt
3 cups ice
gloves or towel for mixing