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.
The conclusion of this experiment made it quite evident that taking apple cider vinegar helps dissolve liver and gallstones but there is no way of knowing from this experiment alone how much ACV would dissolve the stones in the body.