Why a leek?
Fenglei loves this character:
which is the mascot for a voice synthesizing software called Vocaloid. This particular Vocaloid is named Hatsune Miku.
So somewhere along the line someone thought it would be a good idea to have Miku sing a polka while waving a stick of leek.
If you're really curious: http://knowyourmeme.com/memes/leeks
So then we saw this:
selling for $12.90 or something.
Naturally I announced "I can do that!" and promptly went to Daiso to get three balls of yarn and a crochet needle.
It turned out this thing needed less than two balls of yarn and half a pack of stuffing. It cost me less than $6.00. Now I have a floppy crocheted leek which Fenglei waves around ecstatically.
And that's the story behind this amigurumi leek.