There’s nothing wrong with obsession, except when it leads to stalking some actress outside of her Beverly Hills mansion every night.  Otherwise, though, obsession channeled in the right direction can lead to cool things like a working Lego version of the arcade classic Donkey Kong.  Take that Calvin Klein.

This monstrosity, built by Dan Kressin, even features a radio controlled jumping Mario.  What kid wouldn’t have wanted this back in the 80s–or now, for that matter?  Finally, you can have something the kid from Silver Spoons didn’t.  Below is a video detailing the workings of the system.