For my ATC I've used a gorgeous digi frame from Meljen's Designs. I printed it out on acetate (on a whim-never tried it before but will definitely be doing it again!) and then stamped an image and coloured it with promarkers. It's backed by a piece of lilac vellum with a bit of glitter too but it doesn't show up very well. To tie in with the challenge I added a sentiment and a little star embellishment.
I really enjoyed making this out of acetate and as I have lots of different coloured vellum I can see me making a set!
I've just had a lovely comment from Sue at Creative Craft World telling me about the Mini Challenge so I'm going to enter this over there too.