Impossible Geometry by Nicolás Basbous Merlo

Effect: The magician presents a playing card, which has a triangular hole. This "hole" is transformed into a squared hole.

After another magical pass, the square hole transforms into a circular hole in a very visual way. The card is shown on both sides.

- The only effect that changes from TRIANGLE to SQUARE and then to CIRCLE : two DIFFERENT changes, three DIFFERENTS shapes.

- NOT need black background.

- Changes are made in the center of the playing card.

- No flaps. No magnets.

- Can be held with the tips of the fingers and by the edges of the card (literally).

- Very easy to do.

- Downloadable version.

- Very detailed explanation of the gimmick construction.