Here's one way to have a great afternoon: Build a massive LEGO train with 50 meters of track -- so long that it can span through your entire home, into the yard, then back inside.
Then, after a few test runs, strap a GoPro to the top of the train so you can get some excellent footage of the train cruising through the property. Turn the train on, wait awhile, then grab the footage off the camera and see what happened.
Or, if you don't have it in you to do any of that, just watch this guy's awesome video.
See if you can recognize these movie scenes made entirely of LEGOS.