Somebody on this site recommended Dr. Nickelsen when I posted the same request about 6 months ago for taking my 3 year old to his first visit. He's with Pediatric Dentistry on Summit St. in Elgin. Phone number is ###-###-####. We've only been to the one visit so far, but the dentist was so patient and friendly. The person who recommended him has an autistic son who does really well with him, so I thought it was a great referral. :) They have trains in there that my kids loved and my son talked about it positively for a while after (though he did cry when the dentist got close to him to look in his mouth). They also had a little cartoon video for him to watch about the dentist visit before being seen by the dentist.