This summer, through August 31st, bring a specially marked Kraft String Cheese to Fiesta Texas in San Antonio and get $15 off general admission any day of the week. With adult admission costing $54.99, this could get you into the park for under $40 or under $20 for kids.  Remember kids under 2 are FREE. To make the deal even sweeter, Six Flags and Kraft have teamed up with TerraCycle to collect and recylce the cheese packaging. Familes can also enter the “Twisted Adventure” sweepstakes through June 30th for a chance to win 20, one-day admission tickets to their local park.  No purchase is necessary. And you don’t have to live in South Central Texas to enjoy this deal.  Six Flags is also in Chicago, St. Louis, Arlington, Los Angeles and San Francisco.