Here’s another way to recycle those old calendars:
Use them as a positive rewards sticker chart for your kids. We are currently using one as we embark on potty-training with The Boy. It is hanging on the wall in the bathroom and he gets to put on a sticker every time he uses the potty. It works so well because the squares are already in place. It is hanging right down at his eye level and he likes looking at the new picture each month.