Here's an addition to the discussion about toilet paper origami. The origami club at Tokyo University has put out a number of publications of designs by the members, and one of these is a volume of toilet paper origami designs. It came out several years ago, but is still available. You can see it at their site here (http://orist.tiyogami.com/) by clicking on the publications heading and selecting the bottom entry, or you can go straight to the Japanese Amazon listing for it: http://www.amazon.co.jp/トイレットペーパーおりがみ-講談社の実用BOOK-折紙サークルOrist/dp/4062997304 /ref=sr_1_1?s=books&ie=UTF8&qid=1377665775&sr=1-1&keywords=トイレットペーパー You can get an idea of the contents by clicking on the tiny photos under the cover image. I also believe you can order books from this store and have them shipped overseas, though I'm afraid I don't recall how it's done. In any case, it's clear the students at Tokyo University have spent a lot of time sitting around thinking this stuff up, and I'm betting the club building's washrooms are well worth a visit!
Andrew Dewar
