If one of the two surfaces is breathed on, a symbol appears each time, which then slowly disappears again, so a total of two symbols (card values or lettering/symbol).
There are two variants: 1. Ace of Clubs / 2 of Diamonds 2. IDIOT / Wavy line
Diameter approx. 4.5 cm, 0.2 cm thick.
The delivery includes an instruction sheet on how to use puff glasses, but without a trick routine.
