How about a Sunday of Kart Racing at Slick Willy's Karts & Eats in Wyomissing, PA: http://slickwillyskarts.com/?
The best deal is $37.95 for 3, 14 lap adult races. If you've never done high speed kart racing before, 3 races is plenty. I'm suggesting either 3/2 or 3/9 @ 11:30am, their opening time on Sunday. The only other fee is an annual license which costs $4.95. This place is about 30% less than Lehigh Valley Grand Prix and they use electric karts, so there are no fumes.
If you have a helmet, bring it. If not, they have helmets and head socks you can wear.
I spoke with someone there and they said that Saturday is their busiest day, hence the Sunday date. Also, if you dig into their website, you'll see that you can reserve races, but you pay the single race price of $17.95 for each race you reserve. Which is why I suggest we just show up and get the 3 race deal.