of course when some companies found out that quilters were using crayons they had to put some out...for fabric...so they could charge more. i was one of the dummies that paid $7 for a box of prang crayons at the lqs...
after making picture quilts with the pre-schoolers, using what ever crayons they had, we found it made no difference, the prangs were the same as the crayolas, and same as the dollar store crayons, they all worked just fine. as for markers, you do need either fabric markers (less bleeding) or permenent markers. water based washable markers will wash out.