Dom, the Woodbridge Kart Club does have a Cadet class (8-12 year olds) but currently it’s not very popular. And of course we do have a shifter class.
But rather then go back and forth here, just give me a call and I’ll be more then happy to give you all the specifics. Also as mentioned above, there is a small sprint track in Maryland call Sandy Hook Speedway, which has a nice group of “sportsman” classes (8-12 yo).
Check out the Woodbridge Kart Club web site as well as Sandy Hooks.
My contact info is listed on the WKC site, as well as Jeff Troup’s who is also involved in the Sandy Hook program.