I am a huge fan of Jan Brett - her illustrations are amazing - their attention to detail and all the background research she does to make her designs authentic make her books unique and captivating! Jan leads her readers through her books with side panel illustrations that show what happened on the page before and what is coming next! Each page is extraordinary!
You can find lots of resources on the internet to use in retelling each of these stories - coloring cards and outlines to make all sorts of mitten projects. There are great black-line illustrations for the Jan Brett version at http://janbrett.com/put_the_animals_in_the_mitten.htm. I couldn't find one for the other version but it would be fun to make!
Have your children work on a way of retelling each story and ordering the sequences of events - it helps them with comprehension! You could do a comparative sequencing with character cards or a Venn diagram to sort it all out - all have met with great success with my kids!