Around this time each year I post a link to this site.
https://folk.uib.no/nmioa/kalender/Making the calendar should keep the kids (and/or adults) occupied for an hour or so.
It could be a little extra gift for grandma.
Hints:
Using 120gsm paper makes a more robust calendar
Score all folds before cutting out.
Make the tabs a little shorter.
Leave November until last.
Keith