Bicycle model kits (e.g. Airfix, Revell, Tamiya, etc.)

Don't really see the point of model bikes, but the jury's out whether this is madness or genius:

http://bmxmuseum.com/forums/viewtopic.php?id=116630&p=1

I think it's great. It's obviously a lot of effort to make everything from scratch, but some people are just so good at this that they can/want to afford to take the effort.