talkmagic.co.uk

Just having a look on ebay & these 3 items, similar in what they do, all look like excellent purchases, if they work as well as they make out.
Anyone bought any, could do a review?

http://www.ebay.co.uk/itm/NEW-TOSH-o-El ... 5af0f7f8c6

http://www.ebay.co.uk/itm/NEW-TOSH-0-o- ... 3381e67bf8

My main question is, how do you activate these, what are you meant to press to light the paper, how invisible is this?