Jumping wires

There is a magnetic field around the electrified wire, and the wire is wound into a coil, forming a circular magnetic field distributed along the center of the coil. After the coil is instantly energized, it becomes an electromagnet, and the south and north poles of the electromagnet are respectively close to the south and north poles of the magnet, causing the coil to jump to the other side due to repulsion between the same poles. Operating instructions: Press the button once and observe the coil popping out of the magnet. Press the button repeatedly and observe the coil bouncing left and right repeatedly.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.