1936 – The Gyro-Cycle – Hubert Charles Henry Townend (British)

The Gyro-Cycle – A pseudo-pedalling machine. Source: "Mechanical Toys" by Athelstan & Kathleen Spilhaus, 1990 First Meccano Magazine advertisement was in April 1938. A very ingenious scientific toy. Toy was invented by a famous airplane designer in England. Action depends on the well known gyroscopic principle. The front wheel is the gyroscope and drives the …

1988 – “Wendell” the Unicycle Rider – Garner Holt (American)

Wendell the Unicyclist premiered in 1988, and is the world’s only unicycle riding animatronic figure. He performs without any visible means of support. Source: The Illusion of Life: Lifelike Robotics, Gene W. Poor, 1991  "… But the most impressive component Garner brings to the animation marketplace is an extraordinarily creative mind with superb  problem-solving and …