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Ice cream in 5 minutes

Posted at 7:11 PM on Aug. 1, 2006

Want a fun and tasty science experiment to do with your children? How about making ice cream in a resealable bag in just 5 minutes?

Here's what you need:

ice
1 cup half and half
1/2 cup salt
2 tablespoons sugar
1/2 teaspoon vanilla extract
1 resealable sandwich bag
1 gallon-sized resealable freezer bag

Fill gallon-sized bag with ice and salt.
Mix ingredients in small bag an seal.
Placed sealed small bag in large bag.
Shake for approx. 5 minutes.
Open bags and eat ice cream. Be sure to wipe salt off the outside of the small bag first.

For chocolate or strawberry ice cream substitute syrup and half the sugar.

So where does the science come in? The salt lowers the freezing point of water allowing it to remain frozen longer. For a variation on this experiment see http://www.stevespanglerscience.com/experiment/148

Have fun!

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