Start out with a square piece of paper. You can use any colour you like, regular paper, or card stock or scrapbook papers with pretty patterns or glitter all work well. Heavier cardstock is harder to fold, but holds its shape the best after it's finished. Our smallest squares of craft paper were 6 cm by 6 cm, and they went up from there.
To create our star shape, begin by folding the paper in half. Keeping the fold edge at the top, next, fold the top left corner down to the bottom edge to make a crease, then unfold , and fold the bottom left corner to top and make a crease.
Where the two creases meet is the mark where you next fold the top right corner to.
Now take that same right corner and fold that flap back on itself to line up with the edge.
Next, fold the whole piece in half along the middle folds.
Finally, use a pair of scissors to cut a straight line, as shown in the image. The deeper greater the angle of the scissors, the pointer the star will be, Experiment after making your first star, to see what angle is your favourite.
Unfold the star and reverse the fold lines where necessary to form the points of your star.
You can also use a hole punch to add some pattern to your star. I used a mini hole punch to create a lacy look to some of my stars. I also painted some with irredicscnet paint, and added glue and glitter to some.
To make the stars in to hanging Christmas decorations, I added a mini hole to one point at the top of the star and used a darning needle to thread some cotton string through it. You could also choose to make double sided ornaments by making two stars the exact same size, and a hot glue gun to attach two together. To make a tree topper, use the same method but with larger stars.