Beneath the retired shuttle Atlantis Monday morning, children crowded around a plaque dedicating a time capsule packed with shuttle program mementos.

They might help open it in 2061, on the 50th anniversary of the program’s 135th and final flight, Local 6 news partner Florida Today reports.

"As important as our past was, our future is what it’s all about," said KSC Director Bob Cabana during a ceremony at the KSC Visitor Complex’s Atlantis exhibit. "Just imagine where we’re going to be 50 years from now?"

The time capsule itself was hidden behind the wall holding the commemorative plaque.

Its contents were selected by NASA and contractor shuttle program employees to celebrate the final mission and three decades of shuttle flight.