I am a STAR because ...
How about using them for an "I am a STAR because ..." activity. Each child makes their own origami star then writes down 1, 2 or 3 (you specify) points about what makes them special inside the star. Perhaps they could write their name on the front and you could display them in the classroom. Or ask each child to write one for another child - great for self esteem.
Origami Star Advent Calendar
Use this simple origami star to make an advent calendar: the front flap opens up so that you can conceal a picture or message inside. Perfect for a child to make for a younger sibling. Make the stars out of bright and shiny paper and stick them all over a large piece of cardboard, either painted or covered in gift wrap. Now write the numbers 1-24 randomly on the stars.
You could use some of our Christmas gift tags as the secret picture inside each star!
Christmas gift tags to print