In order to keep the bricky appearance of the train engine intact, [Robert] hollowed out a few cheap imitation LEGO bricks to house the electronics. He also cut out slots for JST connectors ...

Dive into the world of renewable energy with this wind-powered Lego train project! Watch as we build and test a Lego rail car ...

but you could literally make up a layout using nothing but a craft knife and pizza boxes. We’ve actually featured other LEGO train hacks before, like this neat automatic decoupler design.