LEGO has its fair share of fails amongst its good designs. We'll even talk about a LEGO animal set that was so bad, it was never released! Watch the entire video so you don't miss the worst one!

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 ...

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 ...