A really convincing mental trick that can be presented in a lively manner. A transparent sheet of Plexiglas, to which four metal clips are attached, sits in a wooden frame which has not been prepared in any way.
Four uninitiated volunteers assist you. The first chooses a playing card, which no-one else sees. The second thinks of a number with several digits, for example, the third a capital city, the fourth a term chosen at random from technology, science, language, etc. Each of them writes down what they have thought of on a sheet of notepaper and puts it in a small envelope. Their envelopes are attached to one of the clips on the sheet of Plexiglas.

Nothing is switched, the envelopes have not been prepared, there is no special notepaper, no initiated members of the audience or assistants. Nevertheless, you are immediately able to name the card, the number, the capital city and the term, too.

Ingeniously simple and convincing. The pieces of notepaper can, of course, be read and checked again at the end of the presentation. All parts are completely normal. The audience may examine the sheet of Plexiglas, the frame, envelopes, clips, simply everything. It doesn't matter what terms the members of the audience choose, you know them immediately. Easy to present, no systems! Stunning in its effect and also very entertaining, which is not always the case with mental tricks.