Hi. I'm not in MN, but is there any way your child might be tested to "skip K" and go into 1st grade? While public school are often rigid about their age cut-off dates, private schools tend to be more flexible. My son attended a private school for gifted kids that was accredited through www.nais.org ~ perhaps that's an option in your area?
You might also like to join Greatschools Gifted Group at community.greatschools.net/groups/11537