Sure, you can buy one, but making an Advent calendar is a nice family project—and you can use better treats!
You will need:
a large piece of cardboard or poster board
24 small containers such as cardboard boxes and envelopes
art supplies to decorate your calender (markers, paints, stickers)
a glue gun
24 small treats, like candy or toys
Tip: Cut the cardboard into a holiday shape, such as a Christmas tree, wreath or snowman. Make sure the containers are attached in a way that makes them easy to open.