TL;DR:
> Novelty clocks:
>
> Whacky clock - ticks once a second, but on a random tenth-of-a-second, so it's arhythmic.
> Wavy clock - tick frequency is proportional to a sine wave. Sort of looks like it's "surging."
> Lazy clock - picks a random interval and then ticks that number of seconds very quickly and then just stops.
> Crazy clock - runs at three different speeds - slow, normal or fast. Much more subtle than it sounds.
> Vetinari clock - runs slightly slow, but adds a periodic "stutter" tick to make up for it.
> Warpy clock - runs 10% fast for 12 hours, then 10% slow for 12 hours. Makes the days just fly by.
> Early clock - keeps time anywhere between 0 and 10 minutes fast. For those who like to set their watch ahead to avoid being late. This clock keeps you from trying to "compensate," because you never know how early it is at the moment.
> Tuney clock - ticks normally most of the time, but occasionally will tick out "songs," like shave-and-a-haircut, or SOS in morse...