Ivor the Engine.

Ivor the Engine is a British children's animation by Oliver Postgate and Peter Firmin's Smallfilms company. It is a children's television series relating the adventures of a small green locomotive who lived in the "top left-hand corner of Wales" and worked for The Merioneth and Llantisilly Railway Traction Company Limited. His friends included Jones the Steam, Evans the Song and Dai Station, among many other characters.