Put simply, over this way bread comes in plastic bags, with small squares of plastic (see Exhibit A below) to seal the bag. Within 1 trillionth of a second of taking it off the bag, it is impossible to find.

So, I devised a prototype, a tinfoil hat covered with the little plastic squares.

Initial trials were not entirely successful as I can't find the hat again, it's here somewhere (rummages down the back of the futon..)
-- not_morrison_rm, Sep 22 2016

Exhibit A http://i.dailymail....578-344_634x453.jpg
[not_morrison_rm, Sep 22 2016]

//Each plastic square could be mounted on a biro.

Children, avert your gaze!
-- not_morrison_rm, Sep 22 2016



random, halfbakery