【Development Story】 The phenomenon of two matchboxes moving in unison has existed for a long time, and various mechanisms have been devised. In cases where two matchboxes were secretly connected by a mechanism, the matchboxes could not be shown completely separated. A magician from the UK named Bob Ostin published a different mechanism for two matchboxes moving in unison in his book under the title "Clear Deception." This mechanism allowed the linking device to be removed at the end, enabling the matchboxes to be handed over to the spectator. Although the instructions explained how to make the props by hand, many imitations were sold due to the fascinating phenomenon. Tenyo, with Bob Ostin's permission, while preserving the original idea, completed the props as items that could be handed over to the spectator by incorporating the mechanism directly into the matchboxes themselves, rather than removing it. Phenomenon - The magician opens two boxes, one depicting the sun and the other the moon, and shows them clearly. There is nothing inside and no suspicious features. - The inner boxes are replaced, but one box is left pulled out. When the two boxes are placed vertically together and one box is closed, the other box magically opens by itself. - This happens even when a card is placed between the two boxes, when they are shifted and joined, or when they are stacked. Finally, the two boxes are completely separated, yet the inner boxes still move in sync. Reference Video: https://youtu.be/TNRHeVdSWaI Product Contents: 1 Moon box, 1 Sun box, 1 sheet of replacement labels for each outer box, and instructions.