This is a simple treat box that can be cut, decorated, and constructed in no time flat. The box pictured here measures 3" wide by 2" deep by 2-1/4" high. It easily holds 3 cookies in a cellophane bag. At this size, you can make 2 boxes out of a single sheet of cardstock, plus scraps for the greeting.
First, refer to the image below for cutting and scoring instructions.
Next, decorate the outside of your box. Don't worry about getting good coverage on the bottom flaps, since they won't really show.
Fold the box together. The small side flap tucks to the inside, as do the smaller 2 bottom flaps. Glue or use double-sided tape to secure.
Stamp a greeting on a scrap of cardstock and attach to the front of your box.
Fill the box with a cellophane bag of treats, tied with a ribbon.