Kate's toy airplane was a small model airplane that is one of Kate's most prized possessions, being a symbol of her relationship with Tom Brennan. The toy airplane was found in Edward Mars' Halliburton case after the crash. Kate's toy plane was a model of a Douglas DC-3 propeller aircraft. It had a special significance to Kate as it was originally owned by Tom, her childhood sweetheart, then placed in their time capsule, then retrieved many years later when they were adults. ("Born to Run")