a Weasley clock

tbornottb built an actual functioning (digital) Weasley clock, to show the location of family members:

It is perfectly wonderful.

Any sufficiently advanced technology is indistinguishable from magic. 
- Arthur C Clarke, 1973. 

This may be a borrowing, possibly unconscious, from H. Rider Haggard's fiction She (1886),

Have I not told thee that there is no such thing as magic, though there is such a thing as understanding and applying the forces which are in Nature?

Of course,

Don't believe everything you read on the internet.
- Ben Franklin, or was it Abe Lincoln ? hard to find a definitive source for this one.. 

However the wiring diagrams and other tech for the clock seem quite plausible.

Continuing with the quote theme, one of my favorites:

Oh, oobee doo (hoopdeewee)
I wanna be like you-hoo-hoo (hapdeedoobydoowop)
- Louis Prima, 1967