Crossroads is my homage to the packet tricks of old. The sort of thing I love finding at conventions: a weird little gimmick, some printed instructions you can read and perform in ten minutes.
A simple three phase routine centred around a question your spectator genuinely wants answered, building to an impossible and surprisingly personal climax.
No apps, no electronics and nothing complicated. Just a strange little simple gimmick that does far more than it has any right to.