any tracks in wisconsin?

I have a 10 year old son who is interested in go-cart racing. Are there any tracks in wis. and any sanctioning bodies that they run under? Thanks for any help.

I know that there's a good Kart track on the grounds of Road America in Elkhart Lake, and there's always something going on there.

http://www.sugarriverraceway.com/
Badger Raceway Dousman, Wisconsin
Karting Kettle Elkhart lake, Wisconsin
Sugar River Raceway Brodhead, Wisconsin
http://www.esatclear.ie/~karting/track_usa1.html

Good luck to you guys, I wish I would have got into driving at his age!