A steel bar is full of tiny magnets (the little arrows). Line them up and the bar becomes a magnet. Mix them up and it stops being one. Everything here can be dragged or tapped.
| Stage | Method | Pins attracted | Remarks |
|---|
A row is added each time you touch the bar to the pins. Safety: change DC/AC only with the switch off, do not overheat the coil, keep magnets away from watches and phones.