SereneHome,
I fell asleep! Ah! Anyhow, On the website I have it states:
Black Friday through Cyber Monday Sale
Get FREE Economy Shipping* on your $75+ order of any products!
Use code WCYBER14 & select 'free shipping' at checkout.
Clearly, WCYBER14 is not working for you (I still haven't tried it, and won't because I have Real science for kids and critical thinking to sift through), so it does make more sense that it's without the "W". :)
Anyhow, at this late at night, I'm not going to try. Trying to get to bed asap. :) If I do get a chance, I'll post whatever does work.