One homeopathic remedy I can strongly recommend: neti pot. It washes out inhaled pollens, for a mild improvement in allergy symptoms, and the salts provide a mild pain relief (just like gargling salt water when you have a sore throat). The BIG benefit is that it prevents secondary bacterial infections, and greatly accelerates the recovery if you do get one. Allergies prime the sinuses for a bacterial takeover, and the infection is usually much worse and longer lasting than the allergies.
Good luck getting a child to use it, though. I can't even get DW to try it.
Otherwise, we're a Zyrtec and nasal steroid household, plus Benadryl as necessary.
