if it is true bipolar you MUST medicate. it is a fallacy that there are natural treatments out there for things like that it is very serious. get a correct diagnosis and do what the doctors say.
Something in their diet or environment is upsetting the children. Go to NutritionFacts.Org. Dr Michael Greger chases down the latest studies on all ailments and their treatments. He is the best place to start. Almost all illnesses and ailments can be treated with diet. You don't want your kids on drugs or in a system which pharmaceuticalises them almost from day 1. Most of us don't realise that lack of certain nutrients in our diets and, of course, poisons in the home and environment cause our illnesses, and that all the lifestyle diseases can be cured with food that gives us what we need. Start with NutritionFacts.Org and read everything you can and watch the related videos and good luck.
The best hope you have is that the diagnoses aren't correct. ADD is often misdiagnosed, so make sure you get more than one opinion. Different people also perform different with this, so one would assume a high-performer who can adapt better to it will have a better chance of not needing medication. But rather than ask on this website where there are no experts, the better thing is to research this and find out whether there aren't training courses that have proven to work without medication. As for the bipolar, is it true bipolar, or some made up form such as bipolar 2. Bipolar 2 and 3 etc. are just forms of depression, and theoretically can be managed with therapy and lifestyle changes, though there's no guarantee. There are also natural remedies that, in combination, might help. But if it's true bipolar, that's a psychotic condition, and most likely medication will be necessary. This is something you have to research at the best medical institutions, both alternative and allopathic, to see what's available in treatment rather than wait for someone to give you a laundry list of possibilities we really know nothing about. Good luck.