The challenge over at Addicted to CAS has the code word Transparent.
I chose to do a card similar to one from the DT over there. MY window actually has some acetate in it and the cat is sitting behind the 'glass'! We used to have a little black cat called Bramble who would sit like this for hours looking out of the window!
The sentiment is from Tattered LAce dies, the window from Memory Box, I think the cat is from them too!
The brick embossing folder is from Sizzix.