A nut, a bolt, a small plastic sleeve, and a small container with a lid are shown. The threaded portion of the bolt is pushed through the sleeve. The nut is placed on the bolt and screwed tight. The screwed nut-bolt assembly is then placed in the container and covered with the lid. The container is shaken for a moment. The rattling sound of the nut and bolt is audible. The lid is then removed. By turning the container upside down, the nut is thrown onto the table. It can be seen that the nut and bolt have magically unscrewed and separated. The nut, bolt, and container are handed to the spectator for inspection.

• Everything can be examined.
• The item measures 6.5 cm (2.5 in.).
• Suitable for any audience.