A selection of the brilliant and bizarre Lego models people put on Youtube. The Pneumatic Caterpillar is truly mind warping (skip to 2:50 if you're impatient!) while Jennifer Clarke's Crane stands out for sheer quality of aesthetic and technical detail. I love the industrial atmosphere and meta-functionality* of the Pin Sorter and last but not least the Felt Tip Printer and its crew of operators just reeks of fun...
* I may have made this term up. But I'm happy with it. Are you?