Originally Posted by Kas
I would get a cool glass jar with a lid and put the fun wooden spools in it as a display. The rayons should be fine, I'm thinking, but I really don't know. Are the varigated ones silk or what? Ya know, if you are worried about the strength of the thread, you can use it for thread painting on a wallhanging where the stitches don't have to stand up to the stress of constant washing.
It's all in French without any English on the package but from my very limited knowledge and a google translator, all I could make out was that it's cotton.