Oil and Water Boxes by Henry Evans
The effect starts when the magician shows six boxes, three standard red boxes and three standard blue ones. They are alternated red, blue, red, blue, red, blue...yet with a simple wave of the hand, the boxes separate...all of the red boxes are together, and all of the blue are together!
The boxes can immediately be shown on every side, and contain cards. In fact, the boxes can be shown from every angle before and after the effect.
No sleights are required for the performance, nor even any special knowledge.
It also includes an extra effect, where the magician asks a participant to choose a number (free choice) between one and six, to select one of the boxes.
The non-selected ones are shown completely empty to the audience, and the only box that contains a deck, is the one chosen by the participant.
This effect is perfectly performable in close-up situations and also for social media.
The product includes three standard red boxes and three standard blue boxes with their respective gimmicks, two specially sized rubber bands to boost the handling of the boxes, and a high quality performance and explanation video.