The Hunger Games is a film about kids killing kids — think a PG version of Battle Royale. But it turns out that filming such a dark movie was actually quite fun. In fact, some of the actors called the experience “Camp Hunger Games.”

Their on-set routine wasn’t all that different from attending a normal summer camp: They got to go swimming, climb trees and learn archery — although in this version, the counselors actually wanted them to aim at their friends.

In the spoiler-containing video above, Wired speaks with Hunger Games actors Willow Shields (who plays Primrose), Amandla Stenberg (Rue), Dayo Okeniyi (Thresh) and Jack Quaid (Marvel) about filming their scenes in the hit movie, which has grossed nearly $700 million at the box office worldwide.

The Hunger Games hits Blu-ray and DVD on Aug. 18. While you’re waiting, check out our video interview above.