Free child's ticket with the purchase of a regular-priced adult ticket (expires 11/02/08):

Coupon Code:  FREEKID

www.sixflags.com

This code may not be redeemable for all parks.  I'm seeing some say it works and some say it doesn't.

20% off $100.00+ (expires 10/01/08):

Coupon Code:  COLDSTONE