Here is an advent calendar my daughter made quickly at her little school. It was optional and she had free reign for design. (I’m not sure if the balloon motif she chose is seasonal- but hey we are in the southern hemisphere, so anything goes.) This is very mathy. Under each day, she has a little countdown. So she has to work out how many days are left until “the day”. She accidentally wrote 26 days and left herself a little note anyway. Such a breezy child! It’s not too late to start! See what your child is inspired to create!