Gyro Gearloose
Gyro's First Invention is a Gyro Gearloose story by Don Rosa that also features Donald Duck, Scrooge McDuck, and Huey, Dewey, and Louie. It is a 50th anniversary story for the character of Gyro Gearloose, as well as a sequel to "A Christmas for Shacktown" (Dell One Shot #367, January 1952) by Carl Barks, and tells of the creation of Gyro's Little Helper.