½ cup milk
1 teaspoon sugar
¼ teaspoon vanilla
Rock salt
1 small plastic ziplock bag
1 large plastic ziplock bag
Have your child measure milk, sugar, and vanilla into a small bag. Seal the bag tightly and have her mix the ingredients around. Fill the large bag with ice and rock salt. Put the small bag in the larger bag, seal the larger bag, and ask her to shake or knead it until it becomes ice cream.
This activity usually takes about 45 minutes to one hour.