I loved Advent calendars when I was a child.  My mom made beautiful hand-made ones for my brother & I – and of course, my parents then had to fill a pocket with a little goodie each morning
I’ve been looking for a free pattern online for an Advent calendar, and I’ve found a couple!  Here’s a flat, tree-shaped Advent calendar from HobbyCraft:

Or how about this charming Advent stocking garland from JoAnns:

There’s also this lovely felt Advent calendar from HGTV:

There you go – enough easy Advent calendars to keep the kids in your life happy until Christmas!