Six Flags offers free admission for pre-schoolers (opens in new tab)

By Robert Niles: Children ages 3 to 5 can get into Six Flags theme parks free this summer, with the company's new Pre-K Pass. The pass is available to current Six Flags season passholders and members. You must register your kids for their Pre-K passes online and then activate the pass in person before May 31. A valid birth certificate or passport showing the child’s age is required at activation, and the child must be present.There is a limit of two Pre-K Passes for each adult pass. You can r...