I let Gage use my rotary cutter, self healing mat and quilt block template to cut out the squares for these. Typically, the kids aren't allowed anywhere near my cutting scissors for fear that they will use them on paper and dull the blade. However, this blade is already good and dull so I figured I'd let him use it and save some time cutting all those squares.
Next we folded each square several different ways until we ended up with a star point.
After the glue dried we used some double sided tape and taped them to the windows.
These can be made in all different sizes. If you want a smaller star then cut your squares smaller. I believe the ones we made were about 10" squares.
If you'd like to try your hand at these then you can go HERE to view complete and easy instructions as well as step-by-step pictures.