Have spent a few moments here and there going around the house finding Balls of Cotton Yarn to see if I had enough to knit a wash cloth everyday for two weeks and this is what I have found.
it is mostly Rowan Hand knit cotton and Sirdar Luxury cotton DK. We don't get Sugar and creme (I think that's the name) but have used this before and they work well.
The skein that is not wound into a ball is cotton my MIL gave me (big bag of it). Hope to get the kids involved in dying it (last day of school is Wednesday) make their own colour combo and then I will make them their own cloth from it.
So I would say I'm good to go.