
Here is my circular saw-shaped card. Doesn't get more manly than power tools, eh? LOL! I used the pinking circle, regular circle, and paisley Nestabilities dies to cut the die shapes. The "saw blade" is card stock covered with aluminum foil. The "Thanks" die cut was made using a Cuttlebug die--yes, this was a shortcut. The rest of the words were made using Sizzix Sizzlit alphabet dies--something that I hadn't used in ages!
I made the card so that it could open. I did this by folding my navy card stock before cutting it, and also leaving part of the fold intact inside the cutting edge of the die.

Here I've opened the card partway to show the rest of the blade. I also placed a smaller paisley shape behind the card front. Not traditional placement, but I hated to cover up the blade and I did want to have a place to write. I added the zigzag edge to mimic the blade--this was from a set of clear stamps by Inky Antics that I don't think had ever been inked, but that I've had for years.
So there it is--my three challenge card. :-) Oh, and my apologies for the play on words. ;-)