DIY Toilet Paper Roll Advent Calendar - tie the ends so that no peeking ensues! Grande Grande Schloegel (Just in case you have extra toilet paper rolls!
Advent calendar tree - paint a Christmas tree on the wall and add small shelves in the same color to hold the countdown boxes
Advent calendar idea- can use different coloured bags or maybe stockings
I would try as countdown to school, birthday or an advent cal. Question of the Day Calendar.small paper cups, a backboard to hold them, and numbered pieces of tissue paper to cover them. Could do a writing prompt for each day.