For the Labor Day weekend, Magic Mountain Fun Center in Columbus Ohio (2 locations) has posted a set of coupons. The best one being 3 hours of unlimited attractions for $15. The attractions include go-carts, miniature golf, and bumper rides. I am including an attachment for just the coupon section, but here is the entire page:

linky (http://www.magicmountainfuncenter.com/eblast/labor09/index.html)