Gavin sez, "David Erik Nelson's new Maker book, Snip, Burn, Solder, Shred, has 24 awesome low-budget projects for kids (and, er, me) such as an electric guitar
screen-printed tees, and the one and only Sock Cthulhu!
Download Project No.3: The Sock Squid from the publisher and check out the last page: Sock Cthulhu! (Note, 'sock' is a noun here, not a verb.)"
Snip, Burn, Solder, Shred (Amazon)
Snip, Burn, Solder, Shred:
Seriously Geeky Stuff to Make with Your Kids (No Starch Press)
(Thanks, Gavin!)