Here are a couple of ATC Round Robins which I've received back, finished. In both cases, I was the second player, so I received a background and added something to it, then sent it to a third person to finish. With this pink card, I forgot to take a photo of what it was like before I worked on it,
but if you look at how it was after I worked on it, and subtract the stitching and the ribbon, I think you get a pretty good idea.
With this one, here's how the card came to me...
I added a star and a transparency in the corner
and here it is, finished off. Both very successful cards, I think!