A collection of stories about Percy, Harold the Helicopter, and other friends of Thomas the tank engine.

Roto the helicopter and her pilot, Roy, fight a forest fire and rescue a dog. Endpapers feature a cross-section of a helicopter with parts labeled and facts about helicopters.

When Osbert the penguin shows up on his doorstep with several friends along with an invitation to Aurora Australis' party at the South Pole, the boy decides to transport them there in the helicopter he received this year for Christmas.

Inspired by a model helicopter and encouraged by their parents and sister, young Orville and Wilbur Wright attempt to build a life-size helicopter from scrap.