How do you make puff balls?

Question

They're kinda like cotton balls onlt bigger and fluffier.
I'm trying to make a hat and it has puff balls at the end of it...Kinda like on Santa's hat

Answer 1

I think you want to make these, I know them as pompoms but they have different names in different countries.

http://www.bbc.co.uk/dna/h2g2/A12461672
http://www.ehow.com/how_5887_make-pompoms.html
http://www.craftown.com/knitpat6.htm