For my birthday the other week, my mate got me a Growing Sealife squid. Pretty weird. You put them in water and they grow. Apparently the size of the container affects how big they get.
I only had a small jug. The thing started out at about 8cm long and grew to this size (iPod there for scale).
Pretty weird huh? I've got rid of it now, in case it has a massive growth spurt over night and smothers me.