Realizing a bit
We need two “states,” e.g.
- high or low voltage (e.g. computer chips)
- why you should protect computer from power surges
- north or south pole of a magnet (e.g. floppy disks)
- why you should keep floppies away from large magnets
- light or dark (e.g. CD)
- hole or no hole (e.g. punch card or CD)