wooden block system

Wooden toy trains are toy trains that run on a wooden track system with grooves to guide the wheels of the rolling stock. While the trains, tracks and scenery accessories are made mainly of wood, the engines and cars connect to each other using metal hooks or small magnets, and some use plastic wheels mounted on metal axles. Some trains are made to resemble anthropomorphical, fictional, and prototypical railroad equipment.

View More On Wikipedia.org