The Irish mail ride-on toy is propelled by pushing and pulling the handlebar. A rider steered his vehicle with his feet. The origins of the Irish mail remain unclear: some sources suggest railroad workers (many of them Irish immigrants) used a three-wheeled vehicle to examine and repair train tracks; other sources suggest a connection with a postal delivery vehicle in Ireland. As a child's ride-on, the Irish mail provides a stable platform for forward motion. Unlike the pedal power of children's tricycles and bicycles, the Irish mail requires the rider to apply upper body strength to operate the vehicle.