DD and I just finished our countdown craft last week, and we've got 85 days to go!
I bought my supplies from AC Moore:
a (thin) acrylic and glass photo frame that holds 5x7
black textured scrapbook paper
Mickey themed scrapbook paper
yellow scrapbook paper (thicker)
a pack of strong magnets with adhesive on one side
a pack of XS suction cups
a pack of Mickey head puffy stickers
a "Disney Vacation" sticker
We just arranged the scrapbook paper and vacation sticker on the inside of the frame, stuck the Mickey head stickers and suction cups to the front of it, and stuck the magnets to the back.
For the countdown numbers, I created a tag shaped template, cut out enough for two of each number 0-9, used a Sharpie to write pretty numbers on my "tags" and punched a hole in the top of each. The tags are kept in a bag next to the fridge and she changes whichever numbers need changing every morning. I'll post a photo of the finished product this evening.
I believe it cost less than $15 using a 40% off coupon for the frame, and it hangs nicely on our fridge door!