Work permits or employment certificates must be obtained from your local school for all minors 14 and 15 years of age before beginning work. 820 ILCS 205/9-12.
The key in using apple cider vinegar to treat kidney stones is consistency. You should take apple cider vinegar every day with lots of water until the stone is completely dissolved, or the pain from the kidney stone (and accompanying issues while urinating) goes away completely.
Cranberry juice is good for kidney health. According to a 2009 study done by University of Minnesota researchers, cranberry juice is helpful in treating urinary tract infections and can even prevent recurrence in young to middle-aged women. This in turn helps prevent kidney infections.