The main Advent calendar we use (we also have a magnetic one) is one with a little book to take out every day that tells a small bit of the Christmas story. We read one little book every night and then hang it - they have slender golden threads like ornaments - on our little Advent tree (this year, a rosemary plant).
We have loved this Advent calendar for many years now. This is the first year that the Lone Star Baby has been big enough to read the little books all by herself so she has been reading them to us. We are so proud of our little Christmas reader!