I managed to get my whole classroom decorated in time for xmas thanks to this lesson! Thank you so much! My 1st and 2nd grade middle schoolers loved it! We used coloured paper for the stars, so there were lots of combinations...I've attached a picture, take a look!

By the way, just as a little tip, If you give the students paper that's half the size of A4, then not only do you use less paper, the stars actually turn out nicer as well! Half the classes made stars with A4 size paper and the rest, with half the size of A4, but quite a lot of students said they preferred the smaller ones...
Oh and I made a PPT and worksheet for the students to follow, in case anybody would like to use those in future. Thanks again, this was great ^0^