The show featured 100 different booths, operating N-scale, HO-scale and G-scale model railroad layouts along with tables of Lionel Trains and a table with operating Lego train sets – including a ...

At Railroads in the Park, several area model railroading groups set up elaborate track layouts and had trains running continuously.

An ever-popular attraction is Lego Miniland, a working train layout with everything, including the trains themselves, constructed entirely of Lego building blocks.

This Lego decoupler can be further improved with an Arduino, a few ultrasonic sensors, and an IR detector to make a fully automatic decoupling siding for a Lego train layout.

Model trains of just about every scale will be on display when the 21st annual Model Train Festival opens Saturday at the Washington State History Museum in Tacoma.