Once you have your 31 colored chart papers strung together, in bold, thick font write out the numbers 1 to 31. Add Christmas-esque detailing to each one, to make it more fun looking. Like for example, a reindeer on Dec the 1st, a stocking on the 2nd, a red and white striped candy cane on the 3rd and so on. Use colors to bring out your countdown ornament.