Kennedy Space Center offers a Kennedy Space Center Boarding Pass to Mars ticket for free to 2016-2017 fourth graders. (You'll receive a printable coupon to present at the ticket plaza. Students must be accompanied by a paying adult; up to three students can attend per paying adult. Each student requires a valid 4th Grade report card or school transcript.) That's a savings of $40. Exhibits include the Space Shuttle Atlantis, Shuttle Launch Experience, and Astronaut Encounter. The pass expires December 31.