1 large and 1 medium metal coffee cans with secure lids
Lots of crushed ice
Rock salt or ice cream salt
Your favorite frozen yogurt or ice cream mix, prepared

It is important to use metal coffee cans for this. It will not work the same if they are not metal (at least the smaller of the two needs to be metal). Also make sure the lids are secure or your yogurt and ice/salt will mix together and ruin your treat! You might consider putting 2 large rubber bands around each can from top to bottom crossing each other (x) to secure lids.The medium coffee can should fit easily into the center of the large can with about 1 to 1 1/2 inches around the outside of the medium can (see photo). Spread 1 inch of ice evenly in bottom of large coffee can. Pour yogurt mix into the smaller of the two cans, secure lid and place inside larger can. Loosely layer crushed ice and rock salt in the space between the two cans by pouring 1-2 inches of ice and 1/8 cup salt evenly around the sides and repeat until you are at the top of the smaller can covering the top with ice. Turn can on side and roll around for about 20 minutes (great job for the kids!) Check ice every 5 minutes or so. You may need to add additional layers of ice and salt as it melts. Check yogurt after 10 minutes being careful to remove top layer of ice/salt and wiping lid before you remove. Yogurt should be thick and creamy. For soft serve eat immediately or for hard serve freeze for a few hours. Enjoy!!