Every story on OPS is a story a contributor heard from someone else. These stories have been overheard and misheard, told and re-told and sometimes refined over time.
The site poses problems in lateral or logical thinking, from easy to hard, with both hints and answers. Great party conversation and something kids will like.
how-to videos or, more commonly, audio/slideshows; useful rhetorically for both technical writing and instructional video learning; web2.0 sharing of video that is perhaps instructionally more useful than YouTube.