Another great site I have found on my travels through cyber space!!!! No wonder I'm tired.
This one posed the following challenge - It had to start with the letter 'K' (I've missed all the other letters !) and it could also add the following two options:
It could be black and white plus one other colour
Add script to the background.
I used Cherry Pie Art Stamps for the script background and the key - and the heart and the Love word are Stampin Up!
I think I've done all three in this example: I've never done a black and white card before - I really enjoyed doing this and will go and try some more.
The website link is http://alphachallenge.canalblog.com/