Lot of 4 advent calendar activities booklets for children from Hallmark
The booklets are new and unused.
The booklets include a craft, puzzle, or activity for a child to make or do each day from December 1 to 24 "...to make the Christmas wait a busy, happy time." For example, December 7 is Make your own paper snowflakes and December 19 is a fill-in-the-words game.
The booklets are vintage from the late 1970s or early 1980s.
They measure 7" by 9-7/8" and have 14 pages, including the back cover. 
Each calendar comes with an envelope.
Three of the calendars are still in their unopened plastic bag packaging. The fourth is also new but in open packaging.
All of the envelopes have folded corners. The envelope of the card with open packaging is sealed to itself. I was unable to check the other ones since they were still enclosed in plastic. The plastic bags have wear. There are minor amounts of rust on some of the staples. 
Please note that some of the crafts require additional items. The front cover of the booklet specifies the materials needed are: pencil, scissors, ruler, crayons, paper (scraps of gift wrap, construction paper, or colored printing paper), new or used envelopes, 4 coins or small buttons, paste or glue, a jar lid (to trace around), paper bags the size of old lunch bags, string, stick or straw, tape, thumbtack or pin, newspaper (another type of paper would work), used Christmas cards, and a toothpick, nail, or other pointed tool.
Please see photos.