From what I've read, white paper is the most likely to be acidic because of something they do/add to make it really white. So I grabbed some of my white Carmen yarn (similar to Fun Fur or Fancy Fur) and tested it with my pH pen. It comes up as acid free.

(You should have seen me trying to do that!

It was really quite funny!)
I'd hit a great sale back in February (maybe?) at Michaels. They had a bunch of different yarns for $1 or $2. I was doing a fiber swap on another board so I used that as an excuse to get more that I'd planned...but I ended up spending $20.

I'm guessing I won't be needed any again -
EVER!!
The point is that Mikes/ACM/Jos all have yarn sales that can really help! They tend to run them more often in the winter months though.
I should have posted this as an enabler last week, but completely forgot about it. When I was at the Dollar Tree last Thursday they had a bunch of those yarns I'd gotten at Mikes this winter. They were the Fancy Fur
type - I'm not sure of the exact name - but they were the Fun Fur mixed with a strand that changes thickness. If you have a Dollar Tree near you, try checking there.
The other thing is to check for a fiber/embellishment swap here on the DIS. That way you can buy one and get back a bunch of different ones. My only problem with that has been that I got some I absolutely loved, but only got a yard or two

and thought I wanted to use it for a bunch of LOs. I couldn't find it at the store either.
