I haven't flown in a few years and never thought then to take any crafting supplies. Please check both the TSA website
http://www.tsa.gov/travelers/airtrav...ted-items.shtm for an up-to-date list of prohibited items. Also verify with your airline shortly before your flight. As someone suggested, carry a prepaid padded self addressed envelope so that you can mail items back home if need be.
Be aware that some airports and security lines are more stricter than others. If you are traveling internationally, other rules may apply as well.
ETA: Just in case, take items that you can live without if they do take them away without allowing you to mail them home. If need be, buy special (cheap :-)) supplies and save your good ones for home.