Hi K.,
First of all, you are doing the right thing by seeking chiropractic care for your kids, despite what one of the other reviews said (falsely accusing chiropractors as quacks and obviously having no personal experience of their own). Listen to everyone else's overwhelmingly positive experiences.
That said, the best chiropractor I know around is my husband! Perhaps one might say I'm a little biased =), but he is truly a great adjuster and great with kids. He is gentle and does an excellent job. He's even been asked by pregnant patients to check their newborns at the hospital!
I know that there are many cases of children being helped for ear infections as well as many other symptoms. I have two daughters also (2 1/2 and 1, and counting). My eldest loves getting adjusted, and has never had an ear infection--the little one either. I don't know if anyone can say for certain that it's absolutely because of chiropractic, but so far so good! They do get their average colds, but so far never really serious ones, and they tend to get over them quickly.
My husband's practice is Abundant Life Chiropractic, located in Sunnyvale, very near the Lawrence Costco. His name is Dr. Andre Tio and his office number is ###-###-####. (He moved there from Mountain View in May, so I don't know if it's listed in Sunnyvale yet.) He would be more than happy to meet you and your family! And so would I!