Here's what I came up with when I was asked to do a 'new baby' card for my cousin... I know, not exactly a card, but I'd come across the template for the shoe at http://www.bydonovan.com/ and was desperate to try it out! (unfortunately the site was lost and is being rebuilt from scratch, but check it out when it's done, cos there are some brilliant templates for all sorts of things). I had the baby toppers anyway so made a simple card that's roughly A6 size, and used one on the side of the box. The box itself was guesswork with regards to measurements, and the top has a panel cut out - it's acetate and vellum in the gap, with a peel off to finish.
I still haven't managed to get started on Christmas cards, I just can't seem to get 'inspired'! But I have just bought loads of craft goodies so once they arrive I'll - hopefully - be coming up with ingenious ways to alter them.
Better get cracking on the Christmas cards so I have plenty of time to play!