I'll have more info after we go.
They have a daily license or a yearly license. It appears that you don't have to get dressed up in a fire suit (never really understood that at F1 indoors). Both adult karts and kids carts. Kids as young as 10 can drive the kids karts (without going through an unbearably long training course) and older kids can ride the adult karts. My son is taller than I am now but 16 without a license, so has been an issue with F1 (he can't ride). So he's in.
For us guys in Eastern Mass, it's a bit out there, but no farther than Wallingford. Just north of Hamp in Hatfield.