J.K.
I got bright colored post-it notes and made a sign that said countdown to Disney. The kids decorated it with stickers and drew mickey heads, etc. ThI started in the back of the post it writing 1,2,3 etc until I was at day 40, then pulled the rest off the top. I taped the whole stack to the sign and the kids took turn pulling off the post-its and announcing how many days left until we left (since we were driving down from Ohio) to the whole family. It was great and my youngest really worked hard to learn those higher numbers so she could announce them without having to be told. Helped with counting backward too!
Hope this helps :)