MicroLoom

A tiny loom for weaving.
Has a frame, a comb for compacting each row and a needle.

http://www.flickr.com/photos/54388270@N04/sets/72157634793760421/

There are many different ways to use this. Here's one:

Cut two short lengths of string, hold parallel, tie one set of ends together. Place knot over one tooth of the loom. Pull tight and tie the other end over the opposite knot.
Continue until all teeth have a pair of strings.

Weave under, over, under, over from side to side. Don't go around the frame. After each row, neaten up using the comb.

When finished, tie up. Slide each of the knots off of the teeth.