If you don't really know what to do with those yarn leftovers, here's is a cute pattern, that does not take more than ten minutes to make and looks ok with whatever size hook you crochet it with...
After making a whole lot of patterns, I realized I was stuck with all these little bits of yarn, that were just too little to start a new project with, and too much to just discard of it, so I kept it tagging along in a bag, not knowing what to do. Until I saw the animated series Futurama and I was inspired by the brainslugs (If you know the series, you'll be familiar with this creature). So I tried to write down a pattern that is real easy and quick to make.
The materials I used (but you could use about any size) were these :
crochet hook : 3mm
yarn : most of it was Scheepjes-Roma, Annell Rapido or Katja Promo Fin which fitted perfectly with the 3mm-hook
safety eyes : you can choose between sizes, I used 8mm and 10.5mm safety eyes from Lisa & Ed's
Time to make a Slimey : 10 minutes for the small ones, and about 12 minutes for the larger ones.
If you leave the belly from mom's pattern, Slimey will fit perfectly in it
the free pattern can be found on my blog here : http://www.beestenbende.be/index.php/en/patterns/48-amigurumi-slimey-and-his-mom