Rowan Cashsoft or Debbie Bliss Cashmerino
Double Knit weight NOT Baby DK (Baby is slightly thinner)
4mm hook or needles recommended
Make a 6" square to the pattern of your choice and post it to the address which will be PM'd.
If you can craft but are short on dough (like me) please don't be ashamed, there are many people itching for the opportunity to be involved who will send you a ball of wool to use!
Donors and crafters are equally valued and respected.
All squares are equally valuable whether expertly cabled or beginner garter stitched. Actually, the complicated ones look best surrounded by plain, so please please have a go
Crafters must sew in their own pesky ends 
I think that's all the "rules" 