The mozzarella cheese kit is a gift for the DIY foodie. Roaring Brook Dairy has put together a kit that has almost everything you need to make four pounds of homemade mozzarella. Each cheese kit comes complete with one dairy thermometer, gloves, detailed instructions, citric acid, salt and rennet - all you need to add is milk. You can add specialty salts or herbs to create gourmet flavors. The mozzarella cheese kit is available online for $21.